Will post in the appropriate forums later!   Ike and Australian Battledress to a Lt in the 810th Engineer Aviation Battalion    Next is an 81st ID grouping obtained via online auction   

This was my grandfather's First Army Engineer SSI. He was very proud of his service during WWII and as an engineer. I would like to know if anyone here can please help me understand this patch a little bit more, such as the materials used and is it American or Theater made? Thank you.

Thanks for the welcome and yes, sorry, I'm new as you know and trying to get the hang of posting.

FYI....the back seems to be some kind of tin/alloy.  It is drawn to a magnet.

Page 415 in Brophy's book.

Type 44 with the 3rd model bayonet. Beautiful rifle and a miracle it has a mum

I already reviewed this one with another forum member via PM. This is a one looker in my opinion. Classic 1/5 helmet and an example I would be proud to own. It is interesting that many 1/5 helmets (some with outstanding provenance) have the same bright red outline of the star against a duller red painted square. There has been conjecture on why, but it is safe to say when I see it, I usually like it if everything else adds up. Other aspects of the design and paint on this helmet reflect favorably on this one being good, and a no brainer on the hole for the ega, and the surface under it. I would say bid with confidence. The post shared by Blacksmith above contains some interesting comments about the ega. From what I can make out, it looks right to me, and we must remember that even if it is a P1920, this helmet came home in late 1919, so if for some reason it was replaced, it could have been within a year or so of arriving home. The surface indicates it has been there a very long time, and I have personally seen the solder under these before. I don’t know why that was done, but this isnt the first one I have seen. Here is the 1/5  in my collection for comparison. Good luck. 

You mean Patch Type Crests?

The buttons are not exposed. Unbuttoned they give more movement. Just trying to figure out to keep it or send it down the road if it's civilian. Thanks.

I thought they were all Poly blend.