The S&W is a 5 screw. The 5th screw is the upper side plate screw.
Doh! I completely missed that it is a flattop! I only opened the pic to look at the wear. Must be it starts with a 3 instead of an 8, and the value of the bundle will go up, even in that condition a flattop will fetch more than a protected sight model.Things seem a little strange with the serial numbers. 357 Flat top 865XX. Last FT was 42689 this should be a protected sight and the flat gate looks like SN 84921 in the picture. Round gate starts at 58895 should be a round gate. I could be reading stuff wrong.