Just looked at my T38

[A. F Medic]

I looked at the Milsurps knowledge forum about the T38. There is a lot to learn just by looking at the images there. Also a T99 is shown that resembles
my Toyo Kogyo series 33.

First, I assume all T38s are 6.5 Japanese. Next is that mine has a sideways rectangle in a circle both on the barrel shank and on top of the receiver. Also on the receiver is 2mm "0".. Closest I could come to it is a Jinsen mark which does not make sense as the rifle is Kokura with no series mark. The serial number is 1978156.

Lastly, also on the barrel shank is a S laying on it's side. That can't be for pointed bullets like a mauser?

No images at this time but I will post some later. Thanks

Information

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[A. F Medic]

Good place to start for Japanese rifle sheet data.

[A. F Medic]

Later I did find some data sheets. The marks I mentioned are normal on some T38s. Meanings not defined.