Type 14. Looks pretty nice just need to clean it up a little bit. Bore looks nice too! Don't see any import markings either. So Far I learned that it was made at the Toriimatsu Branch of the Nagoya Arsenal in July of 1942. Patiently waiting for some ammo to arrive. It has a fantastic trigger pull, can't wait to shoot it. The mag release is a little tricky to operate, doesn't protrude beyond the surface of the grip at all, not sure if that's the way it's supposed to be or not?
Whoah....you may have something very special here...it’s going to need some further digging for sure. That “00” above your serial number is known as a “double zero” Toriimatsu Nambu in the Japanese collecting world. Typically found on the very early production pistols from Toriimatsu and is believed to denote a factory experimental run of a certain firing pin design which differs from normal production. They are very rare and extremely desirable. An immediate discrepancy, however, is that the double zeros typically fall into the date range of 16.10-17.2. I don’t know enough about these to know what that means for yours, but certainly worth some additional research! It’s estimated that only about 185 or so were marked that way from what I’ve read, so if you have a legit double zero Nambu you hit the jackpot.
http://www.nambuworld.com/2011-2 Double Zero.pdf