I have a model 36 & 37. I like the carrying qualities of the model 37 but I like the way the 36 shoots better. Both revolvers will disappear in the front pocket but the 37 does not pull the pocket down as bad. Both revolvers were made in the mid 60’s and both are surprisingly accurate especially the model 36. It sure is fun to show up some of the guy’s at the range with the latest and greatest Glock or Sig with the old school 5 shot revolver with a 1 7/8 barrel…

As for best years I don’t know if there would be a discernable difference between years but if I was looking to purchase one now, I would look as Beemerphile said at the model 60.