SERD Frankfurt
Brief History
SERD (Sanyo Elektronik-Rechner Deutschland), a German subsidiary of the Japanese company Sanyo, founded specifically for the sale of calculators, mainly sold various calculators manufactured by the parent company in West Germany, but later also sold products from other manufacturers under its own brand. Instead of model numbers, the first calculators had names of larger West German cities. Frankfurt, the six-digit machine which is internally identical to Sanyo CX-2002 and CX-2005, has the unusual percentage calculation capability — most of the cheapest six-digit calculators can add, subtract, multiply and divide only.
You can read more about this and competing six-digit models in our special article.
| Manufacturer: | SERD GmbH (West-Germany) |
| OEM: | Sanyo Electric Co., Ltd. (Japan) |
| OEM model: | - |
| Mfg. date: | 1974 |
| Size: | 8,3×14×2,5 cm |
| Weight (ready for operate): | n.a. |
| Type: | four-function |
| Capacity: | 12 digits (input) 2×6 digits (display) 12 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Sanyo uPD238C |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
| Features: | %calculation with percent Ffloating-point notation |
| Display: | 6+1 digit VFD (Futaba 7-CT-02) |
| Power: | 2×AA battery or adaptor |
Frankfurt
Inside of the Frankfurt
Keyboard of the Frankfurt