The short answer is yes-sometimes

My Kenny Howell 2nd Gen. 1st Richards is marked under the barrel - R&D Beloit, WI USA by hand.
I acquired the gun about 2006 and the precious owner had it built on his donor in 1998 or 99.

The Dave Anderson ASM sourced USPFA 1993 Shot Show gun- 2nd Model Richards, was only marked
USPFA  Hartford, Connecticut. roll marked on the top of the barrel no other marks

The Millington Remy was  B. Millington/ArmSport LLC , also had the Pietta FAP Diamond on the grip frame otherwise shaved of FLLI Pietta- Made in Italy- Black Powder Only.

My Gary Barnes Navy conversion has no marks on my donor Pietta 61 Navy- Kirst (totally shaved by request)

I never had a John Gren but handled one once, it was marked as shown in the photo below
I had to look for it though as I had not recalled the markings. 

I soaked mine in walnut dye overnight and they did seem to take it. It's not very deep but it's there.

Thanks!  That would be awesome.  Let me know and I'll send you some $$$ and mention you as the source of one of the grips when I do the Cowboy Chronicle article about these. 

The article will lead off with me being teased by a shooting pard 4 or 5 years ago, wanting me to buy Truth and Justice.  It will chronicle the acquisition, including the skinny grips, and transformation into my main match pair.  Then I will go into a history of Anderson, his guns, and his efforts to make the first "production, semi custom" 1860 conversions, (meant to be cheaper than Howell or Millington), all before ASM introduced production 1860 .44 Colts  in 1990.

Evening y'all.
Internet was out about 24 hours. 

Slim

Please stop posting something that beautiful. I can't afford it.