[Revi16]

What harrison987 is saying is that while the canopy may have been built to fit a pressurized aircraft (G-1, G-3, G-5), it could have just as easily been installed on a non-pressurized aircraft if needed (G-2, G-4, G-6) or it may have been a spare canopy/part.

Because there is very little to no damage seen on the canopy, it could have been a spare part and never installed on an aircraft. There just isn't enough evidence to conclude it was used on a particular G-1.

Was it built as a pressurized canopy.....YES. Was it installed on a particular aircraft........No way to tell.