Old Ink Stamp Stamp...?? What is it?

[krednosreg45]

Sorry for the poor picture... I can provide more and better pics if need be. Found this near an old Mexican Revolution Guard Camp. Figure it's an old stamp... Hollow in the middle with a circular opening on one end.

 

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[Indian Steve]

How big is it? If it is a couple of inches or so, it could be a brake master cylinder plunger.

 

[Rookster]

End pics please.

 

[A2coins]

Is there any lettering on it reverse!!!!!!!

 

[mick56]

Agree with master cylinder piston.