American Handgunner The Keith #5 Single-Action Revolver
I’d venture to say the #5 is the most copied, imitated, sought after, and basis, for custom single-action sixguns. A #5 sixgun has its own traits. The sexy grip-frame is the most obvious, being like no other. How the #5 came about is a wonderful story worth repeating, especially for those who’ve never heard it.
Source: americanhandgunner.com