Old buttons Can anyone tell me how old these buttons are?

[Misuraco]

There is 2 of them I found them in the same field. Thank you in advance.

 

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[devldog]

They look old but are in pretty good shape. Was there some type of benchmark on the buttons back? Congrat's on the find.

 

[Dug]

Those are blowhole buttons. Just got an education on them myself. Check out this thread. http://www.treasurenet.com/forums/my-best-finds/216095-blowhole-buttons-only.html

 

[Misuraco]

Thanks guys no bench marks they were buried near each other 6-8 inches down everything I've dug so far from this site has been preserved really well. Thanks for the info Dug