Himber Z Wallet - Early Michel and Greco - Leather

This was in interesting find as we visited the storage container and came out with a box of unique findings that we are working on getting posted here. This a Z wallet from quality leather and what is interesting about it is you can see the G & M etched into the leather and at the top of those initials a small hand holding a card which appears to be the Ace of Diamonds (but my eyes are getting old so it may be another suit).

Of course these are used as valuable utilities for the magician for transpositions and a host of other alternatives. My question is was this wallet made by Vernet? Was there a time before they formed Vernet, that they released products under the Michel and Greco name? Hmm...

Condition: Good. No instructions included.