https://imgur.com/a/EqCFs If there is any way to look up the id number and find out who it came from, that would be greatly appreciated.
Followup: Why would they have serial numbers in them? Were such items usually tracked?
Hello there! As your question is related to looking for identification / information regarding military personnel, the AskHistorians Guide to Military Identification may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the world, as well as graphical aids to assist in deciphering rank, unit, and other forms of badges or insignia. While the users here may still be able to lend you more assistance, hopefully this will provide a good place to start!
The city he found it in i think was La Havre