AKA: ROGER F-4, AKA (Label): ROGER Fighter, TOHOTRONIC CALCULATOR, Product number (P/N): F4 (F-4),
Keywords/Tags: F4 (F-4) | ROGER | Fighter
Date of intro: 1975, Origin: Japan (List),
Power: 3V,
Display: Type = Display (VFD) (List),
Number of keys: 22,
Miscellaneous switch: [(Blank)-(ArrowLeft)ON],
Classification: / Pocket,
Featuring: Procent, Square root, Memories: 1,
Main Components: NEC: µPD278C,
Resemblance with: (Resemblance 012B),
Known Serial-numbers: 43443071 | 4355104 (List of all S/Ns from TOHO TSUSHO)
Collector value: 7/10,
Internet: Link-1: Robert LACOSTE