Hi, Vicasoto;Hello diaofushui :
That is a very nice display of of T-94 tank rounds, two armour piercing and two high explosive, I also see shipping plugs for the HE.
Did you know that there were eight different 37mm antitank & tank guns, they all used the same size projectiles but have different cartridge cases.
The variations are the case lengths : 4 3/8, 5 1/4, 6 1/2, and 9 7/8. The smallest was the round used in the T-11 infantry gun. The 4 cases in your display look to be the same length, if they are 5 1/4 then they are for the T-94 tank gun, but if 6 1/2 then they were for the T-94 anti-tank gun.
Thankyou for the complement, in reality I am fortunate to own copies of U. S. WW2 publications regarding IJA & IJN ammunition, bombs, mortars, projectiles, fuses, etc.; that helps a lot in being able to identify and answer questions. It helps that my eldest daughter Linda is a military cartridge collector and has those references and thousands of rounds to see and compare. Although my specialty is Japanese sniper rifles and scopes, I own from Murata to Arisaka and a good 80 plus bayonets as well.
If I can be of help to you feel free to call on me, I will be glad to talk or share information. you can write me at : [email protected] or here at the board.