How to identify HP-49g+ production runs

[rprosperi]

(11-24-2022 06:20 PM)gwh Wrote:  The inscription reads HPK-49GPLUS(B) and it has an additional |C logo.
It's the only one I bought (from Spain, on Vinted) with a much better, I guess newer canvas pouch.
I had a white & blue 50g that didn't have the marking either.

I can't feel or see any notable difference, yet again I'm no expert at all.

The 50g plastic case back and this odd inscription have been discussed ad-nauseum here in the past, here is one of several threads about this:
https://www.hpmuseum.org/forum/thread-11...08274.html