37x223R Case ID


#1

I have a brass US 37x223R case that I have had for a while, but never identified the maker. It is headstamped “SER 1942 37MM M16 LOT 15662-28” it also has two crossed cannons in a circle. The primer is stamped: “WC 6-22579-30M23A1 1942”. Where was this made? Any info would be helpful.


#2
  • I don’t know anything about the maker of the primer [“WC”]. The shell case maker’s mark “SER” could be “Sears Roebuck & Co”, Marshall, Texas, USA or perhaps “Sector Tools & Mfg Co. Inc.”, Newark, New Jersey, USA. — Note: An almost identical shell case is the 37mm M17 which is semi-rimmed [not rimmed like the 37mm M16] and much harder to be found. The US made 37mm M17 round was used by AA guns, not by AT guns. Liviu 03/04/07

#3

I suppose “WC” Could possibly be Western Cartridge Co. Do you know if there is any way to tell the difference between Sears-Roebuck and Sector tool and Mfg. ? I saw a semi-rimmed 37x223R For sale the other day, didn’t know it existed until then.


#4

I suppose “WC” Could possibly be Western Cartridge Co. Do you know if there is any way to tell the difference between Sears-Roebuck and Sector tool and Mfg. ? I saw a semi-rimmed 37x223R For sale the other day, didn’t know it existed until then.


#5
  • Unfortunately I cannot tell you for sure which of the 2 companies [mentioned above] used the maker’s mark “SER” and manufactured your 37X223R shell case. Both the 37X223R [yours] and the 37X223SR shell cases are almost identical and as you can see the first is rimmed the other is semi-rimmed. The 37X223R round was used by US 37mm tank and anti-tank guns [US M3, M5 and M6 guns]. The 37X223SR round was used by US 37mm M1 AA gun and other models, including the 37mm M9 gun. The 37X223R M16 shell case is definitely more common than the 37X223SR M17 shell case. Some of the 37X223SR shell cases were made of steel, not only brass. Liviu 03/05/07

#6

Okay, no worries. I will post a scan of this headstamp when I get a scanner.