XB:
1)Your M66(no dash)revolver is very nice also! I think your M66 enhanced the pearls in the picture, rather than vice-versa!
2)Yes, the early(No dash#)M66's are neat with the all stainless sights. I have managed to collect two of those, also. My third M66(no dash)pictured above, was shjpped later than the first two(In 1974)and therefore, was produced with the black rear sight and the red front sight insert.