✅ SOLVED Bullet cartridge caliber/history needed

[cti4sw]

I found this in a residential area, homes were built in the 1920s and 1930s, I originally thought it was a .50 caliber shell but there's no markings save one tiny little "5" on the rim.

For shape reference - the top tapered part is broken off, it's about 2.5" tall now


For caliber reference - maybe the size of a dime


For caliber ID - No markings! Except that tiny little etch I think is a "5"

 

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[cti4sw]

If I get a chance today I'll go back to the guy's yard and check again.

 

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[osage express]

Like Pistol -Pete I am leaning to the Jap now that i have looked closer at it.At this time all i can tell you is what it's not..LOL Osage ...But still looking

 

[cti4sw]

I'm content enough with the partial ID we have Would like a solid ID if one is to be found, but no rush

 

[TheCannonballGuy]

Since it is a 20th-century Military cartridge-casing... go to the War Relics Forum website and post it in the Ammo section. I posted a link to that website in my previous reply, but here it is again: WW2 German, Soviet, Allied militaria, uniforms, awards, weapons history. War relics forum