I've seen some Victory model Smiths that were used by war-time LAPD guys. The traditional LAPD-issued revolver, though, was always the 6", until the late '60's, when the 4" M15 was adopted. Older, 6" K38s were cut down and re-issued to some recruits. Old-timers were allowed to either have their revolvers cut (contracted out in Alhambra, I think) or keep their 6" K38s unmolested. Adjustable sights were required on all issued revolvers. The firearms staff stressed accuracy and used bullseye targets for qualification "back in the day". Also, the LAPD "bonus shoot" was an alternate qual course, using very fast timing, bullseye targets with scoring rings and one-handed shooting. Extra pay was given if the Officer qualified at a higher level (distinguished expert was $64.00 a month, a lot of money in, say, 1950). Officers zeroing revolvers at the Academy between recruit classes or qualifcation runs were common and encouraged.
Fuzzy Farrant, John Hurst, Walter Stark and Guy Hogue (all LAPD Firearms Instructors) didn't start the custom grip thing until sometime in the early 60's. I may be wrong on this, but I never heard of anyone getting stocks made before then. DAO-mandated revolvers were required in 1971. The hammer spur was left on so that the officer could ease back the hammer slightly and GENTLY rotate the cylinder, checking for high primers. I was taught this in the Academy when loading a revolver; still do it out of habit now. Until just a few years ago hammerless revolvers weren't allowed because of the high-primer thing. The firearms staff realized awhile back that high primers were a non-issue.
Bob