HP-50G case puzzle

[ijabbott]

(12-01-2018 11:11 PM)cdmackay Wrote:  hmm, not sure what to make of mine, then, which is:

CNA6280XXX YES

i.e. it does have the molding. I had thought mine was from 2016, not 2006, though.

But there are some letters in the XXX part, right? That would fit the later pattern.