NMCB-2      

Interesting. Thanks Kurt

The pages are partially cut in the upper part. Would you mind sending a complete one? Are there the legends? Thank You !

Here is a scan of that plate.

In-Hand pics and measurements: 2 3/4"x 2 1/4" (Hat/Cap patch?).

USN Seabees OG-107 dtd 1976, nfi. cheers Armygas

The look like they may have been cast and then ground down to make them less obvious.  Its hard to know for sure, but I see some signs of casting (the little blebs of metal and the like.

Found this today at an estate sale.  Stetson-Ross was a well known Seattle based manufacturer of equipment used in saw mills such as large planers.  Patch measures about 13" across.

There's  more shots of this 4th Armd Div worn this way in this topic see Posts # 12 and #245 and #571  and #562  

I'd say it's "unusual."   We used do this with insignia at The Citadel.  Called "blitzing".  Pour Brasso on a piece of cardboard and then  strongly rub the face of the insignia over and over again on the cardboard.  Pretty soon, the insignia would look like your TD. I recall some of our Army TAC officers at The Citadel doing this with their infantry brass.  When I was in the Army, most officers would just go with the original STA-BRITE or anodized finish and not bother with polishing.   Here is my old blitzed Citadel cap badge compared to one I didn't blitz.  (haven't been polished in 45 years)