Back in the old days, 1940-50s some aircraft were equipped with glass
astro navigation domes used to take astro sightings. I am trying to find
one of these glass domes in very good condition for an astronomy project.

the planes that I have worked on with nav domes, the domes were made of
Plexiglass, not glass.
Matt Gunsch,
A&P,IA,Private Pilot
Riding member of the
2003 world champion drill team
Arizona Precision Motorcycle Drill Team
GWRRA,NRA,GOA