The Charles Greenblatt Company was one of the larger S&W distributors in NYC. One of our forum members, Lefty, is very knowledgeable in this field. Hopefully, he'll jump in here and give you a little more info on them.
Here is a pic of my pre-model 32, "Terrier". It was shipped to the Charles Greenblatt Company, NYC on October 9, 1951.
This holster below is stamped "Frank Lavas", a NYC Gunsmith, (see photo) just down & across the street from the Charles Greenblatt Company.
