If you would be willing to share the information listed there from your rifle in the comments, I would be most grateful. Your contribution will help ensure this important part of firearms history is accurately documented.
If you would rather not go to my blog and want to contribute, I am asking for the following information:
1.) Model number (550, 550 1 (no dash), 550-I (undefined 1), 550-1, 550P, 550-1P, 550-G2):
2.) Date Code on left side of bar.l, just forward of the receiver (e.g., R ZZ, B K, etc..):
3.) Pattern on the top of the receiver (Decorative Lines Only, Smooth (no lines), Smooth with Scope Mount Groves, Decorative Lines with Scope Mount Groves):
4.) Magazine Cartridge Opening (Oval Shaped, Cartridge Shaped, 22 Short Only Shape):
5.) Cartridge Deflector type (Early / Special, Post War Late version, or Missing):
6.) Number of Patents stated on top of barrel (2 or 3):
7.) Location of Cartridge Stamp S,L, LR (On side of barrel or directly under the model number):
8.) The serial number if stamped on the rear left of the receiver (e.g., 1300805):
9.) Front Sight type (early, Late, Ramp [for peepsight]):
10) City and State where the rifle is located:
Thank you sincerely for your time and assistance.



