T-94 serial number 70303.  This is a late war 20.5 (May 1945) example that was never blued.  This example is 34 numbers earlier than the example shown in Harry Derby's book "The Hand Cannons of Imperial Japan", 1st printing, page 171.  The magazine is not matching but is numbered 308. Notice the grip/grip screw relationship.  This is a "short grip" variation with an attempt at simplification that apparently didn't work out so well.  One theory is that by having the grip cut straight across on the bottom edge and having a straight milling cut on the frame, production was faster.  But, exposing the lower part of the screw to the hand of the shooter apparently caused considerable discomfort.  So, they quickly went back to the original wood grip configuration. At the bottom are pictures of the frame differences between a short grip and a standard grip.  The last picture (with a standard grip) was serial numbered after the short grip and completely finished.   It make me wonder if, after the short grip was such a failure, that the short grip frames were set aside when they went back to the standard grip configuration.  Then, as desperation ensured, the short grip frames were pulled out right at the end and partially completed.  They milled the grip panel to lessen the impact of the exposed screw head.  If that is was case, serial number 70303 would have been completed after serial number 70565.

The following three pictures show the difference in the frame area of the grip screw of the short grip variation and a standard variation.

This is a 19.5 date, serial number 54298.

This is a 20.5, serial number 70303.

This is a 20.5, serial number 70565.