Cooey serial number reference table

[Walther_PPK]

It may be a long shot, but I was wondering if anyone knew of a reference table for Cooey firearms. Specifically the model 84 shotgun. I know they were all made between 1948~1966, but I was wondering if there was anyway to narrow down a certain serial number/range to an exact year of manufacture.

 

[newf_89]

iv been trying to narrow this down for months and cant find out anywhere