WWII Aricraft Protractor Mark 3B
I bought this from a WWII Naval vet about 40 years ago and it never got used.
The protractor was issued to him but he said he never got it installed because
he really didn't need it.
Anyway, it has 3 mounts (with mounting acrews), extra stainless steel bands, and
$150.00 + $15 shipping