Quote Originally Posted by Singer B View Post
Very nice collection!! Can you provide a better photo of the symbol at the start of the serial number? It is difficult to read and that symbol will help to determine your year of production. Thanks!
It's a circle with 2 horizontal lines. according to here https://oldmilitarymarkings.com/japanese_markings.html it means 4th Series. Put the page does not list the year Nagoya produced it's 4th series.