language barrier : ) i updated a text in info:
PL projectile 37mm Bofors type is in one document [from factory “Pocisk” from 1936] as “trial/test”, section of document with elements of 37mm Bofors / 37x257R - shell duraluminium of projectile 37 mm - probably AP. - i never seen this projectile in real.
I know only this “aluminium” 37 mm wz.=wzór/model 1916 [original FR/produced in PL] from 1932, for 37x94r. << from my photo = hotchkiss/puteaux = 37x94r
Yea i know, im not interested in this.
Alum. shells - 37 Bofors type [this moment only info a “test” projectile [not for standard for army production], and 37 mm Puteaux/Hotchkis [photo] probably are not a standard production ammo for army [but have a standard markings]
i think for “Ballistic Research Center” in Zielonka
I compared only the types of aluminum projectiles from different countries [for a comparision a test types ammo]
I make a tommorow photo of this 30 mm German alu/steel projectile [ but its a different topic].