Injection pump

[Krewcab]

Hello, long time listener first time caller! I recently bought a 7.3 IdI engine that is manufactured in 1991. The pump is from a 93 turbo model I believe according to the numbers! It runs absolutely beautifully but I noticed on a flat on top of the injection pump on the driver side there is a very odd number code! I was wondering if any of you recognize this and know if it stands for remanufactured or what it means! Have Eldin able to find information simply by searching! Thank you