Stamped letters LM - brass cap, button or shell casing?

[FloridaSon]

Found on a treasure coast beach. Does not stick to magnet, looks like oxidized brass. Clearly marked LM and X. 16th of an inch marks on a tape measure. Width about 9/16".

 

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[ANTIQUARIAN]

Looks to be a scale weight.
The 'X' likely identifies the weight, probably 10ozs.

Dave

 

[tamrock]

Well if that little thing weighs 10oz then its probably plutonium.

 

[FloridaSon]

It is very light, the ruffled brass seen from the marked side looks like it came off or was attached to something. Thanks for all the comments guys.

 

[A2coins]

a seal of some kind lots of research youll find it

 

[Sodabob]

Some type of small cap or plug with the LMX facing out. The dents around the edge were caused by it being pried loose with a screwdriver.

By the way, great images!

 

[Sodabob]

FloridaSon

You mentioned "Shell Casing" in your opening statement

I wonder if its in some way related to one of these?

Lowell Ordnance Plant ~ Lowell, Massachusetts

https://stephentaylorhistorian.com/2017/12/10/one-mans-rubbish-another-mans-treasure/

 

[FloridaSon]

That's what I thought too, this morning I was in contact with Guy Hildebrand who collects and restores all types of old ammo. He felt it was not a cartridge. The markings were just so familiar to me for some reason. I like the pried off comment and shipping seal. I'll go that way for a while. Thanks all!

 

[Sodabob]

Maybe its just the primer part of a large caliber cartridge

But if it is a primer, would they stamp the inside with LM X

 

[FloridaSon]

Yes you are right, don't think the insides would get a mark, who would see it? Thank you

 

[Dirtminer]

Looks like the bottom end of a casing with the dent in the middle is where the firing pin hit the primer. Center fire rifle casing.

 

[creskol]

It's a secret .. for those of us old enough, remember L&M has found the secret