I know current/recent manufactured ones do. Does anyone know if that's always been the case? I've had the gray set pictured above for 20 years, and they were used when I got them. I'm not positive they're Altamont, but I've rather assumed they were. Here's the back side, with the frame size marked in ink.Altamont grips have the frame size (J, K, L, N) routed in the back of the grip panel.

I notice some splintering around the drilled holes...I'm guessing they are not Altamont...Here's the back side, with the frame size marked in ink.
I know current/recent manufactured ones do. Does anyone know if that's always been the case? I've had the gray set pictured above for 20 years, and they were used when I got them. I'm not positive they're Altamont, but I've rather assumed they were. Here's the back side, with the frame size marked in ink.
Can't be sure, but your grips look like Altamont S&W K/L Square Bateleur Super Blackwood.
Click on the link below and scroll down to the bottom of the page, last grip set on the right.
https://www.altamontco.com/pistol-grips/smith-and-wesson/k-square
