WW1 US Navy Military Binoculars Optics Field Gear. I don't know if these are for day and night vision. The glass looks nice, the right lens is currently red, and left clear. Sometimes the left one partially shifts to red. There is a little bit of a tinkling noise when shaking, may be natural, may be not.
This item is in the category "Collectibles\Militaria\WW I (1914-18)\Original Period Items\United States\Personal, Field Gear". The seller is "goodthings716" and is located in this country: US. This item can be shipped to United States.