These early Type 1 357 Flattop Blackhawks are my favorite of all the 3 screw Rugers. This package is pretty complete but I thought the serial number was really neat, 3557. This gun was bought at Weatherby's in Los Angeles in April 1956. When I purchased it the original bill of sale was with it but it got misplaced when the gun was packaged for shipping.
Luckily I did have a picture of the receipt on my hard drive. The line by the front screw is a copper lightning strike.