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Perhaps a silly question, but is there a list somewhere of which models have double shot molded keys vs. painted keys? Woodstock, Spice, 41-series, 48-series, etc. In the case of long running models (12c, 48) was there a specific year when they switched?

Classics, Woodstocks, Spices, 41C's all have double shot molded keys AFAIK. Older Voyagers, Pioneers, and 48's too. Younger Voyagers, Pioneers, and 48's don't. Can't tell you a year though.

It's probably a matter of the facility in which the calculator has been produced. E.g., US and Singapore Pioneers had double injection keys, while Indonesian Pioneers had painted keys.

Not so easy to tie to a facility, it's all about date of manufacture. Some pioneers and 48's made late in the Singapore run did have painted keys.

FWIW, 42's were not part of this change over, as production of them stopped in 1995. The last batches of service spares built in 2001, in Indonesia, had molded keys. So, they were either built from molded parts already on hand or the molds moved to Indonesia. I suspect it was from parts remaining in inventory.

Also, with very few exceptions, the 10/11/15/16C models had molded keys. Only here in the museum was it documented that some late production units had "painted over" keys, where double shot keys were painted black and then relabeled with a new function. The 12C gold classic has had painted keys for a long time, beginning with production in Malaysia.

Edited: 23 Apr 2012, 7:44 a.m.

If I had to guess I would say around 1997-1998. In the case of the 48, it was when production switched from Singapore to Indonesia.