"Hi, the dome is plexi-glass and would have originally been all clear. At first it looks like an astrolabe dome ( but is way too small ) so I would second guess it to be a light cover of sorts that would poke out of the fuselage from the inside"
Would be really interested to confirm for sure what it is! I found it on the landing strip of a WWII US bomber base, it had recently been ploughed for the first time since the war
Great looking collection. Thanks for sharing.
I specialize in M1 carbines and Lugers.