Looking at some of the pictures it looks like there is some pitting on the left side just above the stocks and the inside of the cylinders look either really dirty or there is some pitting in there.
To me, it just looks like it wasn't cleaned the last time it was shot. If I had the spare cash, I'd bid on it. Good luck on this, @Stephanie B!
The TV show Adam 12 was a favorite of mine as a kid, and they carried Model 14 and then Model 15 revolvers. Martin Milner used his own Model 15 revolver, beginning in Season 4. From IMDB firearms:
“Throughout the series, Pete Malloy used distinctive finger-groove grips by custom grip maker (and famous LAPD range master) Earl “Fuzzy” Farrant. Starting in season 4, Jim Reed also wore custom Farrant grips on his Mdl. 15.
This Model 15 was the personal property of actor Martin Milner. He would use it again in 1989 in the made for television movie "Nashville Beat". It came up for auction in 2014. See the discussion page for further details”.
My posts only represent my personal opinion and do not necessarily reflect the opinions or official policies of any employer, past or present. Obvious spelling errors are likely the result of an iPhone keyboard.
That's a great pistol, good luck! I have a 4" Model 15 and it's a great shooter.
Along with the 2", and the 6".