Model 66 no dash. #2k540xx, looks like 1971. Luck and good timing were on my side yesterday, as I found this nice boxed 66. It has the early stainless rear sight also. Here are a few pics.
Really nice!!! I've seen a lot these overpriced lately, and not even the pre-1982 P&R ones. The Combat Magnums (19's and 66's) are really on a roll right now.
Those grips are real beauties! Very nice package you have there. I have a no-dash with stainless sights as well; likely produced less than a year later than yours.