Vintage Electronic Calculators:

Overview of Brands


RICOH: 1221P
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AKA: RICOMAC 1221P, AKA (Label): 7520-35, Product number (P/N): 752035 (7520-35),
Keywords/Tags: 752035 (7520-35) | 752000 (7520-00) | 1221P
Date of intro: ~1974, Dimensions: 300x240x96mm, Weight: 4100g,
Power: AC,
Display: Type = Display (None) (List), Digits = 12,
Number of keys: 30, #Key-Grey: 17, #Key-SilverColor: 1, #Key-White: 12,
Decimal switch: [F-(Plus)-0-1-2-3-4-6], Round switch: [(ArrowDown)-5/4-(ArrowUp)], Indicators: POWER MEMORY,
Classification: / Desktop with Printer,
Featuring: Procent, Logic-technology: LSI (Large Scale Integration), calculator-chipset, Memories: 2,
Related with: RICOH_docu: 75208501 (Instr.) 1221P; RICOH_docu: (Ad.) *: We're out to make... (1216,1217,1221P,1221PD),
Main Components: HITACHI: HD3584; HITACHI: HD3585,
Other components: HITACHI: HD3227P; ROHM: BA604 {4x},
Resemblance with: DIEHL CALCULATING SYSTEMS: Valutronic (version-1),
Serie-members: RICOH: 1221P (Without display); RICOH: 1221PD (With display),
Known Serial-numbers: 75200015432 (7520-00, 15432) | 75203564018 (7520-35, 64018) (List of all S/Ns from RICOH)
Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: DENTAKU MUSEUM


(Courtesy of: YOSHIDA T.)

Internals (PCB)
(Courtesy of: YOSHIDA T.)
75204025A (7520 4025A)

Label, name plate
S/N: 75203564018 (7520-35, 64018)

Created: 02-jan-2006, Manual-update: 05-jun-2018, Batch-update: 26-feb-2024             

# Pageloads since 2018: 55             

4 Pic(s),


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