Perspex Panels Identification

[Crosswind01]

Below are links to photos of six perspex panels and a perspex dome with a flattened section. There are no identifying numbers and the only background to them is that the previous owner thought they might have come from a B-17. The ruler included in the photos for scale is 34" long. Can anyone help? Thanks!

https://imageshack.com/i/n668cd7j
https://imageshack.com/i/n60htcej
https://imageshack.com/i/nmz7o3j
https://imageshack.com/i/n1ye8ej
https://imageshack.com/i/nrh8nuj
https://imageshack.com/i/nmdmiqj

[India Four Two]

Crosswind01,

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