Early
Electronic
Calculator
Desktop Calculator Units: Source & Status

Manufacturer
Model
Serial Number
Year of Manufacture Date of Receipt State upon Receipt Current State
Facit
1123

302.500
1969 (transistors stamped with 9C, capacitors with 6850) 1970s Flaky, can't add. Fully functional (Apr 2000).
Monroe
925

E017715
1970 (Acoustic Delay Line unit stamped with 08 Oct 1970) 1970s Good physical condition. Fully functional (Dec 1997).
Facit
1114J

1415950
1973 (transistors stamped with 3B, IC with 3A) 1970s Good physical condition, but something was wrong with it. Non-functional (1970s).
Miida
MC800

(unknown)
1971 (ICs stamped with 7131,7132) 1970s Good physical condition, but most keys stick down because the plastic plungers have cracked and expanded. Case and keyboard discarded, electronics still functional (1990s).
Texas Instr.
?3500?

(unknown)
1975 (Integrated circuit stamped with 7508, APR 16 1975 on plastic bracket) 1970s Unknown. (case discarded)
CDK
C1HB

453342
1977 (IC stamped with 7710, IC of second unit with 7623) 1970s Good physical condition, functional. Fully functional (12 Jun 2001).
Toshiba
BC-1212

165632z
1970 (sticker from Barr Business Machines (the retailer) on case says 1970) 1970s Good physical condition. Fully functional (15 Apr 2000).
Ricomac
1216

44218
1974 (ICs stamped with 4A,3K) 1970s Good physical condition. Fully functional except for bouncy keyboard. Fully functional except for bouncy keyboard (1970s).
Victor
19-1421

4666-006
1973 (Integrated circuits stamped with 7321 and 7322) Jan 1990 Good physical condition. Fully functional. Fully functional (Jan 1990).
Commodore
DAC-612

209040
1969 (Philco SC1772 ICs stamped with 6921 and 6945) 1990s Some corrosion on screws and nuts. No display. Fully functional (Feb 2000).
Monroe
610

209040
1971 (Integrated circuits stamped with 7103, 7107, etc.) 1990s Good physical condition, functional. Fully functional (12 Jun 2001).
Rapidman
1220

06-400597
1973 (Integrated circuits stamped with 7309 and 7322) 1990s Good physical condition, functional except some segments are slow to ionize. Fully functional except for slow segments (12 Jun 2001).
Canon
130

100206
1966 (transistors stamped with 6C, wire stamped with 1966) 02 Nov 1999 Good physical condition, fully functional except for a few burned-out numeral lamps. Fully functional (04 Sep 2000).
Sony
SOBAX 2500

620173
1970 (transistors stamped with 0J, capacitor with 9D) Sep 1999 Display active but numeral entry does not work properly. Board B need 504 IC and repair of decimal point issue.
Board E needs a 502 IC, a 504 IC and repair of M register issue (May 2014).
At this point, this unit (3) is a sacrifical unit for ICs for unit 620175 (5).
Sony
SOBAX 2500

620175
1970 (ICs stamped with 0F) 28 Nov 2000 Display active but showing random flickering numerals. Fully functional (May 2014).
Miida
MC840

722638
1972 (ICs stamped with 2G,2H) Jan 2000 Keys stick down. Fully functional (Feb 2000).
Commodore
US*10

39713
1973 (Integrated circuit stamped with 7312) Jan 2000 Very dirty. Chunk of plastic missing from lower front lip. Functional. Fully functional (Jan 2000).
Eldorado
8K

88925
1973 (Integrated circuit stamped with 7301) Jan 2000 Very dirty, functional except for bad display. Fully functional (Jan 2000).
Eldorado
8K

92722
? 25 Jan 2001 Very dirty, functional. Fully functional (Jan 2001).
Addmaster
Simplex 12

5614
1973 (Integrated circuits stamped with 7309 and 7313) Jan 2000 Very dirty, functional. Non-functional.
Canon
Canola EP151

200464
1971 (Integrated circuits stamped with 6927, 7031, 7126, etc.) 08 Dec 2000 Some neon lamps light up. No printer motor activity. Stuck in print mode. No known source for the special electro-sensitive paper (05 Apr 2002).
Canon
161

700369
1966 (variable resistors in power supply stamped with 6604, transistors stamped with 6E.) 08 Dec 2000 Good physical condition. Multiple and inconsistent functional problems: pressing the clear key does not clear all digits; pressing a numeral or operation key results in random numerals in the display and may turn on the overflow lamp. Internal test-mode switch seized. Fully functional (22 Jan 2001).
Victor
MEDALIST 204

9840628
1976 (IC stamped with 7628) 03 May 2000 Good physical condition. Fully functional. Fully functional (May 2000).
Olympia
CD401A

0428711
1974 (IC stamped with 7403) 03 May 2000 Good physical condition, functional. Fully functional (May 2000).
Sharp
Compet 17

810591T
1968 (transistors stamped with 8K, capacitor with 6749) 10 Jul 2000 Minor scratches, functional. Fully functional (Jul 2000).
Victor
18-3441

4173-594
1971 (Integrated circuits stamped with 7140 to 7147) 25 Jan 2001 Very grubby from storage in industrial warehouse. Non-functional. Fully functional (31 Jan 2001).
Hewlett-Packard
9815A

1529A01234
1976 (ICs stamped with 7609) 09 Nov 2001 Functional except for gooey rubber on tape drive wheel. Functional except tape drive (15 Feb 2007).
Hewlett-Packard
9815A

9872A Plotter: 1742A01137
1977 (transistors stamped with 7739) 09 Nov 2001 Not tested. Electrostatic hold-down sheet on platen is partially loose. Functional (17 Feb 2007).
Toshiba
BC-0802

C56128
1972 (TMS 0105 IC stamped with 7209, display tubes stamped with 2D.) 13 Mar 2001 Good physical condition. Internal power-line fuse blown. Fully functional (Mar 2001).
Toshiba
BC-0802

K66028
1972 (TMS 0112 IC stamped with 7235, capacitor with 7228, case stamped with 47.5.8 or 47.8.5.) 07 Jul 2001 Crack in case. Functional. Fully functional (08 Jul 2001).
Lloyd's
Accumatic 70

(not specified)
1973 (ICs stamped with 7307.) 09 May 2001 Rather grubby. Window in front of display presumed to be missing. LCD display has a bubble in it, leaving several digits only partially active. Functional except for LCD display problem (09 May 2001).
Sharp
ELSI 804

31000977
1973 (ICs stamped with 3E,3F, tubes with 36C) 10 May 2001 Fair physical condition. Plastic tabs on bottom of case holding line cord strain relief and one screw in place broken off but still present inside case. Fully functional. Fully functional (10 May 2001).
Sharp
ELSI 804

3001464
1973 (ICs stamped with 3A and 3D, tubes with 3DC) 15 Nov 2000 Good physical condition. Fully functional. Fully functional (Nov 2001).
Rapidman
1208 LC

11456
1972 (ICs stamped with ?.) 18 May 2001 Missing display window/bezel. LCD display has a bubble in it, leaving several digits only partially active. Functional except for display bubble (02 Jun 2001).
Rapidman
1208 LC

10499
1972 (ICs stamped with 15311:7250, 10417:7308,7308.) 23 Jun 2001 Good physical condition. LCD display has a bubble in it, all segments are active except for decimal point of digit 2. Fully functional except for decimal point of digit 2 (23 Jun 2001).
Lloyd's
Accumatic 680

?
1983 (IC stamped with 8319, keyboard with 58.8.23) 18 May 2001 Good physical condition. Fully functional. Fully functional (08 Jul 2001).
TA AG
ARBM 1217-II

78706876
1984 (IC stamped with 4B 45, display with 4F) 19 Jun 2001 Good physical condition, functional, missing one 'knob' for slide switch. Fully functional (04 Jul 2001).
Wang
320K

201034
1970 (Display board stamped with Sep 30 1970, nixie tubes stamped with 7019, microswitches with 6833, RCA transistors with 9A, 0H, 0F, bottom plate with 12/10/69) 24 Jun 2001 Good physical condition. Missing the external logic unit. Needs external logic unit (24 Jun 2001).
Wang
320K

201062
1969 (Nixie tubes stamped with 6718 to 6916) 24 Jun 2001 Excellent physical condition. Missing the external logic unit. Needs external logic unit (24 Jun 2001).
Hewlett-Packard
9825B

1622A04584 "#1"
1980 (ICs on top two boards stamped with 8035). Jan 2002 Partially dismantled. Fully functional except state of tape drive unknown (26 Mar 2002).
Hewlett-Packard
9825B

1014A00435 "#2"
1980 (shipping sticker dated 17 Sep 1980) Jan 2002 Partially dismantled. Fully functional except state of tape drive unknown (22 Mar 2002).
Hewlett-Packard
9825B

1003A13784 (Jurgen's 9825A)
1980 (shipping sticker dated 21 May 1980) Jan 2002 Partially dismantled. Fully functional except for tape drive (29 Mar 2002).
Commodore
US*1

P01258
1973 (Integrated circuit stamped with 7320) 07 Jul 2003 Rather grubby. Functional. Fully functional (09 Jul 2003).
Casio
AL-1000

(unknown) (boards and cage stamped with 7530)
1968 ? (some components stamped with 8F and such) 21 Sep 2003 Missing case and power supply. Wire harnesses from logic chassis to keyboard cut. Digit 12 (3rd from left) Nixie tube broken. Fully functional (22 Oct 2007). TO DO: consider relacing 12V bridge rectifier, currently runs somewhat hot.
Wang
520

BB 1046
1972 (Board stamped with 31 January 1972) 21 Sep 2003 Received as 3 parts, main chassis, ROM board and keyboard. Missing case, printer and tape drive. -12V regulator transistor dented. ROM has at least one broken wire. Complete model number is 520-14-T-P. Also marked with Canada Agriculture 128516. Fully functional, except tape and printer operations cannot be tested (03 Apr 2015).
Canon
163

122900
1969 (Most ICs stamped with 6901-6914, ICs on board 2 a little later: 6946 latest.) 17 Dec 2004 A little grubby, some corrosion on steel sheet surfaces and on numerous screws. Several of the PCBs appear to have seen repairs by resoldering of many of the connections. Operation results are incorrect when first powered up. OK after warming up for awhile. SQRT(2) initially resulted in 1.417... Fully functional (Apr 2014).
Canon
163

120234
1968 (ICs stamped with 6745-6842). 02 Jul 2011 Fairly good physical condition, scratch on top. Zero key sticks down. Keyboard PCB previously repaired, cracked in area by power switch. Addition adds extra zeroes corresponding to the decimal point position, e.g. with DP switch at 4, entering 2 and pressing add results in "2000.0000". Looks like a problem with decimal point alignment counters in the state machine. Subtraction/negation do not work, subtract key functions the same as the add key.

Two SN15846 ICs noted at 5-105 and 5-107.

Fully functional, although DP alignment problem may be intermittent and reappear (Apr 2014).
Victor
18-1721

4485-456
1973 (Integrated circuits stamped with 7128 to 7306) Jan 2004. Good physical condition. Problems with display. Fully functional (24 Feb 2004). Returned to owner 26 Feb 2004.
Casio
121-B

?
1970 ("0K" stamped on IC) 2006 Non-functional. Display presents all-zeroes with all decimal points lit. Numeral keys are not entered in the display. Fully functional (Jan 2007).
Canon
Canola 120

901577
1967 (decoded from stamp of C420425 on PCB) (information received May 2015)
Canon
130S

862091
? (?) 2014 Feb
Monroe
650

840435
1971 (stamp in case of 46.12.6, 1925+Showa46=1971) 2015 Jun Fair physical condition, no display, with special cordset. Fully functional (2015 Jun).
(52 items)



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