Is there a convenient source of finding when a DRGM number was issued. I am interested in finding the issue date for DRGM 1,423,932 for a Carl Schlieper Sodbuster Jr knife with black wood handles. I tried doing some google searches & found a bit but not a lot. It does seem that DRGM numbers ceased being issued in 1949 but could have been used for an additional 3 years or up to 1952.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra