Army DI dui SB screwback pre-ww2 540th COAST ARTILLERY coastal nhm RARE

Description

Army Unit Crest
Please see the picture. This is an hard to find DUI/Crest for the unit shown.  It is in the condition shown. May have some wear from having existed over the last 50-70 years.  Out of a collection. If there is ink writing on the reverse, it comes off easily with a little alcohol.
Unit= 540th COAST ARTILLERY REGIMENT
Fastener= screwback
Maker= no maker hallmark
Time Period= WW2 era (but likely interim and pre-war)
Condition=as shown in pictures, original condition as found
Please ask any questions before bidding and as early as possible. I don't do refunds as the items are clearly pictured.
I charge .75 in the USA for this shipping which is what the materials and shipping actually cost me. I will combine shipping on multiple items and I can ship several crests for same cost.
International shipping is either 18 usd (airmail) and this covers my cost. (the US Postal Service has this crazy price, not me. Thanks).