Vintage Electronic Calculators:

Overview of Brands


TRIUMPH-ADLER: 81S (version-5)
(Page 1/1)

AKA: TRIUMPH 81S, AKA (Label): Type EC 24A, Product number (P/N): EC24A (EC 24A),
Keywords/Tags: EC24A (EC 24A) | 81S | TRIUMPH
Date of intro: ~1975, Origin: Japan (List), Dimensions: 120x75x20mm,
Power: 6V: (AAA x4),
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 27, #Key-Black: 12, #Key-Blue: 1, #Key-Orange: 2, #Key-Red: 1, #Key-White: 11,
Keyboard Array (Rows x Columns): 06x05, Keyboard Layout: [CI] [C] - [(SquareRoot)] [(Pi)] [(-)] [%] [x<>y] - [7] [8] [9] [(Division)] [CM] - [4] [5] [6] [x] [M-] - [0] [.] [=] [+] [M+],
Decimal switch: [F-2-3-off],
Classification: / Pocket,
Featuring: Procent, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Main Components: HITACHI: HD36265,
Resemblance with: IMPERIAL: 91S; ROYAL: 91S (version-1); ROYAL: 91S (version-2), (Resemblance 037),
Serie-members: TRIUMPH-ADLER: 81S (version-1) (ADLER LED-display); TRIUMPH-ADLER: 81S (version-2) (ADLER VFD-display); TRIUMPH-ADLER: 81S (version-3) (TRIUMPH LED-display); TRIUMPH-ADLER: 81S (version-4) (TRIUMPH VFD-display 17 Keys); TRIUMPH-ADLER: 81S (version-5) (TRIUMPH VFD-display 27 Keys),
Known Serial-numbers: 66935936 (66.935.936) | 68579922 (List of all S/Ns from TRIUMPH-ADLER)
Initial Cost Price: USD69.00, Collector value: 7/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),


Label, name plate
S/N: 66935936 (66.935.936)
(Courtesy of: ELIFANI Angelo)

Created: 15-jul-2016, Manual-update: 04-dec-2020, Batch-update: 26-feb-2024             

# Pageloads since 2018: 111             

2 Pic(s),


If you have a (better) personal picture and/or missing info about any model not listed: Please do send a Mail