VERY OLD.  MOST LIKELY FROM THE 1800's.  

ETCHED THROUGHOUT!  They look to be nickel plated.  No markings found.

They are 4 3/8" across the front.  The bridge is approximately 5/8".  They are 4 1/2" long.

Condition:  The glasses are wearable.  No bends in the metal.  Still flexible.  One of the lenses has a small chip on its edge.

Let me know if you have questions....thanks

Location D3, MER, FBMP