Just bought my first Model 99 .250-3000. It was made in 1949 (per David Royal's excellent book) or 1950 according to the online serial number lookup. The serial number is 529636. The lever boss code is 23 with what was likely an A, it's just too faint to tell.

[Linked Image from guncollectorsclub.com]

I'm hoping someone can help me identify the letter designation for this gun.

Greg