✅ SOLVED Designated Unit Insignia from whaere?

[cscholtensmt@gmail.com]

These may be South Dakota National Guard from WWII, or California? I cant find any information.
They are DUI pins, enameled. Found with 100% attendance medal dated 1933.
2 1/4 high x 2 ' long
screw type back attachments with Robbins Co Attleboro marked on the back of each


Any help would be so appreciated!

 

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[Charlie P. (NY)]

Welcome!

That's pretty close to the 225th Engineer Brigade.

 

[nhbenz]

109th Engineer Combat Battalion, as seen here: Welcome to 109th Engineer Combat Battalion South Dakota was correct.
I have to admit that I was surprised how many shared some of the same symbols!

 

[cscholtensmt@gmail.com]

Wow, you guys are GOOD!! Thanks so much! I think Ive found my "go to" site for all things! Thanks a million! SOLVED!