S&W Model 66 No Dash.

For additional pictures: https://www.israel-arms.com/Smith-Wesson-Model-66-no-dash-p/7k52509.htm

This is a solid Smith model 66 no dash in good used condition. It has a few minor marks on the frame, I have tried to take close pictures of the marks. The grip panels are in above average condition showing a very minor scuff on the left panel. It is so minor that you may not be able to see it in the pictures. No box but it does come with a soft carrying case. 

Features:

Fixed red ramp front sight
Adjustable rear with white outline
Matte rib
*Pinned barrel
*Recessed six shot fluted cylinder
Service hammer and trigger
Three screw K frame with square butt
Serrated checkering on backstrap and trigger
Target gold medallion checkered stocks

Model 66 History

The S&W Model 66 no-dash is a first production run revolver. The no-dash 66's have a pinned barrel, a hammer mounted firing pin, and the cylinder chambers are cut to recess the .357 magnum cartridge. No box or paperwork.

1970: Model 66 introduced
1974: 2.5" barrel introduced
1977: 66-1 design change. The gas ring was moved from the yoke to the cylinder, reportedly to prevent heat expansion from binging the gun.
1982: 66-2 design change. Delete the barrel pin, delete the recessing of the hammer mounted firing pin.

The major change is that the no-dash model 66 is still pinned and recessed which is and still is a big deal to collectors. The model 66's are more valuable to collectors and people who want a more reliable and basic 66. Quality S&W Model 66's are getting harder to find so you will probably see prices continue to increase in the future.