I am looking at a box of Western .30-40 Krag. White box with White label. On the bottom is a date code of 4RB61 stamped in ink. Does this code indicate a date of Feb. 16, 1940? I’ve tried web searches this evening and not coming up with much. The month and date aren’t bad but the year codes I find confusing.
https://drive.google.com/file/d/0B2nznGdKmtklTTF0bjVyUVdzaUk/view?usp=sharing