Old military button

[whynot]

Here is a military button found in Panama while diving. Obverse has single threaded pin, sorry no pic. This seems to be steel, may have been covered in brass or other alloy at one time... Any ideas which branch of service and about when it was issued? Thanx in advance...
-David

 

[Woodland Detectors]

Looks like a ww1 "great seal" collar disk 1902- present day. About $20 But not positive...mike

 

[whynot]

Thanks! Thought it might be WW1

 

[spartacus53]

Welcome to T-Net and congrats on that button