I come through this request help from colleagues to try to identify the origin, or what was the
With 99% certainty it is a mirror that came to Brazil from the USA more than 10 years ago. It belonged to a teacher already provided and the current owner was unable to explain the origin.
It is a 317.5mm at f / 6, with 1 "thickness and pyrex glass. Secondary 65mm on the smaller axis also with pyrex with 15mm thickness.
On the side there are inscriptions of your measurements in inches, something that is not used by us Brazilians beyond the initial LK.
If anyone has any information about a similar mirror, or if they've seen something similar, I would like to leave a comment here.
I appreciate any and all help!