I'm estimating that these vintage Nelson spectacles are circa 1920s. They may very well be closer to the 1910s, but I'm erring on the side of caution since I've seen advertisements for The Bishop Company of North Attleboro, MA spanning 1910s-1920s.
These come with their original case and are in good condition considering their age. The metal does have some unevenness to it, probably from normal wear. It's not too noticeable nor are there noticeable scratches on the lenses.
The bridge has the 1-10-12K gold-filled marking, as seen in the third photo.
Thank you for looking.
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