Also found this but looks kinda modern more info on it if you could guys

[crazyscot]

Any info is appreciated it says acid test on the back

 

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[Bryanhashemi]

Infantry crossed rifles tack pin. 1880's or so

 

[crazyscot]

Wow I didn't think. For a minute I could be that old!

 

[crazyscot]

It not I lol

 

[Bryanhashemi]

Now it could go to the early 1900's but still old. It would be gold plated and acid test on back would prove that. Saying if a acid test was done, the base metal well show

 

[crazyscot]

Thanks for your help bud!

 

[nhbenz]

This pattern, with crossed 1795 muskets, was introduced in 1923; Evolution of U.S. Army Infantry Insignia

 

[Bryanhashemi]

Had my date off. Sorry crazy.

 

[crazyscot]

No worries thanks for taking the time to help guys still a little piece of history for all I know this could have been to war and back a little treasure in my mind

 

[wvwildman]

nice finds congrats HH

 

[TheCannonballGuy]

Nhbenz is correct as usual -- that version was introduced in 1923.

More specifically about the one you found... the style of attachment-pins, the "chrysanthemum/snowflake" pattern on its back, and the backmark "Acid Test" mean is is from World War 2 (and later). It was made by Amcraft (American Metal Craft co,) of Attleboro Massachusets, one of the most prolific producers of US Military insignia during World War 2. That company is still in business, manufacturing US Military insignia.

You can learn more about the significance of clutch-pin attachments in dating US Military insignia here: Dating Metallic Insignia: Clutch Fasteners