What I thought was interesting was the M1905 bayonet in the 'real' (wartime) layout.

The 10" M1icon bayonet was introduced in 1943 and many M1905s were then cut down to the same size, consequently the 16" M1905 became much rarer. I don't recall ever seeing a photo of one in the ETO.

Possibly a training photo taken in the US?