Well, if it does any good I found the details on one of them:

Manufacturer: S&W 163624
Item: 26256
UPC: 022188636246

Specifications and features:
S&W model 629 Classic revolver
.44 Magnum & .44 Special calibers
6-1/2" Power Port barrel
6 round capacity
Single/double-action
Black rubber grips
Large, stainless steel frame
Satin stainless steel finish
Partridge front & adjustable rear sights
12" overall length
54.5 oz. empty

AND, I found this: The gun with the 103624 product code is a pre-lock revolver, while 163624 would be a later model with the internal lock.

Does any of this help you?