Small button help needed

[ModernMiner]

Can any of you button nuts ID this small button I found last week?
I think it is brass, and is way smaller than a dime.
I can make out "Extra" on the backmark, and possibly "B(?) & H".
Any idea of the company and/or age?
Thanks,
MM

 

Amazon Forum Fav 👍

Treasure of Victoria Peak - Grab it through Amazon!

[txkickergirl]

my guess early relvolution civilian era button
check out this link it has lots of old buttons

http://metaldetectingworld.com/05_photo_gallery/05_us_civilian_but/index.htm