Japanese "Battleship Binoculars." Nikko No. 1805, 20x, 3-degree true field, 120mm aperture. Weight ~40 pounds. Length 25.5 inches. Maximum width 12.25 inches.
These need some work, and I've tried to carefully describe all the issues. They don't seem to show up on the used market often, and I think these have a lot of potential for someone with the right skills and/or resources.
I've had these since the mid-1970s, thinking to restore or have them restored someday, but I've decided it's time to give someone else the opportunity for an interesting and rewarding project. A friend had an identical pair that was in very good condition, and they provided nice views. When I first had this pair, I had a pipe mount they slid down on to. In spite of their problems, Jupiter was a sharp, small disk with two bands visible.
The eye lens on the left eyepiece has one serious scratch and several smaller ones (see photo).
The objectives are in good condition, but need at least a good cleaning, mostly on the inside, where the outer portion appears hazy. I can't tell if they need time on the polisher or not.
The right prism assembly appears to be in very good condition. The left looks like it needs a bit of cleaning and work, with one interface showing signs it needs to be taken apart and recemented.
The left eyepiece will not turn to adjust focus. Neither has an eyepiece cup.
The left rotating prism housing, used to adjust the IPD, does not move, and the piece that threads into the rear housing of the main binocular is marred (see photo). The band that connects the prism housings so they rotate together is missing, as is the housing to enclose the band (these may be squirreled away somewhere - I'll keep looking). The band itself should be easy to replace.
There are two 1/4" holes near the outside end of each dew shield. The dew shields are out of round at the front, and have a ding and a dent near the base of one (see photos).
The paint seems to be original.
Please ask questions if you want to know more, or ask for more detailed photos if they would be helpful. I want to avoid any confusion about their condition. I think the right person could turn these into something very nice.
Clear skies, Alan