20mm Rounds

[Todd Gylsen]

What can anyone tell me about these 20mm rounds? All are WWII dated.

This one marked

MMD
Lot 51342-9
2-42

End marked B.P.C. 1942 M21 20MM

[Todd Gylsen]

This one marked:

CC
Lot 51337-26
3-42

Next is marked:

MMD
Lot 50135-36
1-42

[Todd Gylsen]

This one marked:

Hot A.P.M. 75 with Tracer
(on casing)
1943
20MM M21A1B1
Lot xx-810

[Todd Gylsen]

Last one marked:

With yellow head

I.R. CO.
Lot 9-1
12-41

[Gil]

For allied 20 mm Oerlikon gun.

[Todd Gylsen]

Thank you Gil. What does the yellow band signify, if anything, on the one particular round?

[klarkon]

Gil's answer is wrong, this is not 20mm Oerlikon ammo, but 20x110 Hispano ammo, all is made in USA.
MMD ( The projectile was made by the Auto-Lite Battery Corporation of California „Metal Manufacturing Division“.)
Shot A.P. M.75 with Tracer ( Solid projectile with tracer )
I.R. CO. Lot 9-1 12-41 (The projectile was made by the International Register Company, Chicago )
B.P.C. 1942 M21 20MM (Bowen Products Corporation: Ecorse, Michigan, USA)
DURA 1942 20MM M21 (Dura Division of Detroit Harvester Corp., Toledo, Ohio, USA )
CC Lot 51337-26 3-42 ???

http://www.municion.org/20mm/Hs404.htm

Markings of 20mm ammo :



Shot A.P. M.75

[Todd Gylsen]

Superb info. Thank you very much!!