Are all Kim Ahrend grips stamped???

[doubletapp357]

Recently acquired some sets of Kim Ahrends grips for my N Frame Model 57. 3 sets I own have a black stamp Kim Ahrends PO Box and location and one set does not.

Should I be concerned ?

 

[hkcavalier]

All of my retail bought sets do, but some of my S&W factory sets from the late 1990s and early 2000s do not. Anecdotal evidence but it's what I have...

 

[doubletapp357]

Here they are

 

[doubletapp357]

this is the grips