Attached you can find some pictures of my 66-1 (on the last photo with his little brother "Erma ER 442" in .22WMR
).
As the S&W logo is on the left, I think the revolver was manufactured in 1981. It was barely shot and shows only very little signs of carry.
Although I really like this revolver, I was a little bit disappointed of the quality of this gun. By and by I removed many of the toolmarks - now it is a keeper!
By the way, the holster is a sickinger "Beltmaster" allowing to carry the gun in two different ways (cross draw or FBI).