MOST LIKELY FROM THE EARLY 1900's.  

ETCHED ON SIDES RIMS AND BRIDGE!

Marked "12kgf".  SEE PICTURES.

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

Condition:  Still flexible.  Some light finish wear at most.  The eye pads are in great shape.  Both of the lenses are in great shape with no cracks or chips.

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

Location D3, MER, FBMP