thanks it’s really nice art. I just wonder what this belongs to. I’ve heard theories from PBY to B29 to even tanks.  I wonder if it’s worth posting in the what’s this section?

As eagle mtn stated   If I may add to him   From the TIOH     The distinctive unit insignia was originally approved for the 83d Engineer Construction Battalion on 15 July 1952. It was redesignated for the 83d Engineer Battalion on 7 October 1957.   In the 50s the 83rd Engineer Battalion was stationed believe it or not in France, it  does go to West Germany, when France leaves the Military alliance as it were with NATO, (It keeps the political relations) and all Allied personal must leave France rather immediately.  

Top left is post WWII.  The marking on the back is the “Assmann” mark (don’t laugh) a German insignia maker that made lots of US metal insignia post war

Now that’s a haul, will display very nicely in my opinion. The armoured belt buckle is my favourite though 😛

Was with my wife's grandfather's things. He didn't  fill it out. Her grandmother had told us she went down to watch the graduation.

Pamphlet on malaria. Was with my wife's grandfathers things. He was 13th Airborne in WW2. 8 months overseas.

Would anyone know definitive ways to tell which OG106 caps are cotton and which are poly blend. 

I always wanted a M1903A4 but I never had any luck getting one! How much did you get it for if you don’t mind me asking?

Its all just as you hypothesized, as long as it looked close to the standard, which was found in ARs in this case Army Regulation 670-5 from, the 50s- 60s.   Ones that are available on line so far   AR 670-5 1959 https://ciehub.info/ref/AR/670-5_1959.pdf   AR 670-5 1968 https://ciehub.info/ref/AR/670-5_1968.pdf   AR 670-5 1969 https://ciehub.info/ref/AR/670-5_1959.pdf  

Napoleon said that an Army marches on its stomach.