SThese are trifles
This is American Optical Ful- Vue 12KGF, and yes it's sunglasses of the 40's, but this is a private purchase American Optical, and is not AN6531. These are trifles, because many pilots used gold private purchase American Optical instead of AN6531 American Optical.
Thanks for your answer! A bit dissappointed as I thought they were AN6531. How can you tell? Btw, "these are trifles" is an expression I'm not familiar with... what does that mean?