New member with a question

[BobVA]

Cool, thanks for posting that.

I'm curious what's under the front overlay? The regular 41C markings?

The lack of a serial number may indicate this was one of the test/evaluation units, which would also explain the painted out keys. (They may have planned to shift to a Blanknut when/if it went into production, but perhaps already had some 41c's handy for the prototype.)