I have read on the HP Museum site that 11C, 15C and 16C used 12C keys that were repainted. Presumably because they have so many parts for the 12C. But I have a different variation.
I have a 12C that has the entire 15C key layout that has been painted to be a 12C. All of the 15C keys that are different from the 12C can be seen under the 12C layout. They are in their 15C positions..
I don't see that variation mentioned on the HP Museum site.
Just curious how unusual that combination is?