HP41 Fullnut - Halfnut, different shift functions for Alpha

[rprosperi]

There were no 41CX units made in 1980 or 1981, so if you have cx's with such s/n's, they were assembled by someone from parts or something similar. The early 41C (and maybe CV) units had the simpler style, without all the small text at the bottom.

And I believe original units were produced as follows:

41C/41CV: Gold labeling (these had the shifted Alpha Fns)
41CX: White labeling (these had the shifted text editor Fns)

And these colors also matched the color of the border around the keys on the front side.

But the above is just from memory and could be incomplete... and if so, the experts will embarrass me quickly enough.