@snw19_357, great info! Thanks so much... Yes, previous stocks were as you told. (Can be seen on the pics.) I called S&W customer service. They told its a model 66, which is a consistent info. Also the production date was Nov-1990. They are unable to provide SKU# because of privacy reasons.
@old_bear, yes it is light & small. I can carry concealed even riding a horse.

) -will share some pics when i do-
@Metal Man, you are right not al models have serial number on yoke cut.
@double-dipper, here are some appetiser photos which seller guy shared and i took when testing the gun. Will share much more once i buy it