Canon F-700

The F-700 is an interesting programmable calculator from Canon. Its programming model shares many features with that of other Canons. Curiously, its chipset may be different. Most Canon programmables that I've seen use Toshiba chips, but this one probably doesn't. I've not been able to open this F-700 to check, but I have an OEM calculator that appears to be an identical model: opening that Westfalia-Technik 269878 reveals a NEC chip. It stands to reason that the same chip is used in the Canon F-700. On the other hand, the Westfalia-Technik's circuit board reveals another label: Truly 105, which is a Hong Kong manufacturer. To top it all off, the machine's programming model is identical to that of many Casio calculators, and different from the programming model used in other Canons... Curiouser and curiouser!