These two Model 10-8 revolvers are shown together since they are essentially the same configuration - albeit a few years apart. Both have standard blue finish but the first gun - made in 1981 - has a deeper blue look, probably due to changes in the polishing process. This gun has a serrated trigger and pinned heavy barrel. The second gun has a non-pinned heavy barrel and a smooth standard width trigger.
M10-8 8D60xxx - 1981 manufacture
M10-8 ANB4xxx - 1986/87 manufacture
Here's another that didn't make it on my original posting of these M10's
This is a M10-8, a Commemorative of the CA Dept of Corrections - Peace Officers Association..