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Re: Me109 windshield ?
Maybe it is SiGla (Sicherheitsglas), made from different layers of glass. Depending on the number of layers it prevents full penetation of a projectile and injuries through glass splintering. This is valid for regular glass but should also be valid for acrylic glass.
The same construction features are used today with VSG (Verbundsicherheitsglas), with transparent film between the glass layers.
Regards
RolandF
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