Early Triple Lock....price check.UPDATE S&W LETTER...

[Muley Gil]

Strangely enough, those grips must have been a custom grip for several makes and models. Here's an engraved Colt SAA that sold with a pair almost identical:

COLT SAA ANTIQUE W/ CARVED STEER HEAD MOTHER OF PEARL GRIPS - 41 CAL. SHIPPED TO SCHUYLER HARTLEY &GRAHAM N.Y.C. IN 1889

A LOT of revolvers that landed in the Southwest wound up wearing steer head pearl grips with ruby eyes.

 

[Green Frog]

Didn't Wolf & Klarr offer those grips on their prototype Barbecue guns? That would at least explain the relatively common occurrence of that grip style in Texas.
Froggie