Manufacturer Arsenal Markings
Data sheet and pictures provided courtesy of Brad Bloom
Manufacturer Data Sheet Showing Official Names
Arsenal Markings Showing Commonly Used Names
Tokyo
Tokyo (with proof mark)
Osaka 
Kokura Hourglass 
Matsushita 
Arrow M 
Nagoya 
Nagoya Star K 
Nagoya Triangle 
Nagoya Diamond (Howa) 
Toyoda Automatic Loom Works
(TALW) 
Jinsen 
Mukden 
Rocking Star 