old or new?

[nyiangelo]

found this today at an 1800 site. there's more old broke glass at this site than there is dirt it seems. on the bottom it says "pyrex 72". thanks for the help.

 

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[gleaner1]

The Pyrex means not old. Look for older colored glass. Set your tecter on zero and find the spot that is totally loaded with metal crap signals, which is often the elusive trash pit/bottle dump.