anyone have any idea what this may be??

[blugotti1]

only found half of it. and it's lead and about the size of a fifty cent piece..says" use monkey TRI-S reg.new york." that's all i can read..thanks, David

 

[Mackaydon]

This may help:
http://metaldetectingforum.com/showthread.php?t=62012

This next reference suggests it may be a gas cap to a "Model T" though I doubt it since the patent dates (in the 30s) were filed long after the 'Model T' was around.
http://www.ebay.ca/itm/220821322913
Don.......

 

[blugotti1]

dude you're like the treasurenet thesaurus!!! thanks man

 

[blugotti1]

i think i found it..barrel cap piece...