Had one in blue and one in nickel,
Always considered the snub 15 a bit of a conundrum,

Introduced with a 2" wide rib barrel that is closer to the model 14 barrel, comes out around the same time as the 2.5" Model 19 but as a square butt gripframe only (odd for a CCW) where the 19 snub was a round butt.
The other interesting thing about the snub 15 is that it does not share the frame or rear site leaf of the model 14 or 15 ,
Also like the snub 19/66 the frame does not step down to the barrel rib and it's long rear leaf mates right to the front site ramp.