Ron..... Do you have Jan's "WEIMAR" book ??? Look at page 78 and others. The M/anchor is the Reichsmarine stamp. I have a 4 inch 18/20 with the same stamp and the number 816. Lots of info in the book.
An old anchor clanker like you ought to get into Navies..... will keep you humble and poor but they are a bunch of fun.
An old anchor clanker like you ought to get into Navies..... will keep you humble and poor but they are a bunch of fun.