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US Navy BU Ships 7x50

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Optics Apprentice
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    Posted: June/01/2020 at 02:00
Just got a set of these in good condition, just a little grubby on the inside, flakes and stuff.

The leather is dull, from handling, it has vestigial yellow W.D. crows foot markings, the merest imprint mark and hint of yellow.

Glass is all good.

Came with a case, but I am not convinced its the correct one. Bit of a tight fit really.

Having problems getting the prism cover plates off. They are held on by three screws, they came out easily, but the plates will not lift off to expose the prisms, need to get in there to clean them.

I suppose I am look at Bill here for advice on this. Are they held on but other means than the three screws? Were they sealed (Navalised)?




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Post Options Post Options   Thanks (0) Thanks(0)   Quote WJC Quote  Post ReplyReply Direct Link To This Post Posted: June/01/2020 at 11:05

200601

They were probably sealed with “black wax,” a vacuum seal used in the repair of periscopes, rangefinders, and the like. That, however, is NOT your biggest problem. Unlike most backplates of US military binoculars of the era, those PLATES didn’t have SLEEVES for the EPs to screw into. Instead, the plates were thin with only holes for the threads of the EP to pass through on their way to screw into mating threads machined into the prism housing. Those shiny EP flanges seen in your second photo are used to hold the packplates in place. That’s why there were only 3 screws needed.

Please remember that the backplates are so thin, that even with the EPs removed, you will need to be careful in removing the plates, lest you bend them.   

Where are you getting all that stuff? Are you just a rich guy with time on his hands?

What are you using for a collimator, a Brit Mk IV?

Lots of luck; keep us posted.

Bill

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“Social media everywhere but not a thought to think.” — me

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DPI Quote  Post ReplyReply Direct Link To This Post Posted: June/01/2020 at 11:42
I paid 60GBP for these, together with some nice excellent condition NILs and ROSS binoculars and a great pair of Leitz

The most expensive has been the PNB-2s and the Japanese 15x80s.

Normally the binos are between 50 and 70 GBP depending, the Zeiss12x60s I never pay more than 900 Euros for.

I have a number of friends around Europe who look out for things for me. Had some great stuff that I could not really afford or had the space for. Latest is finding someone who has made some repro late model sunshades for the Zeiss12x60s, the originals are like hens teeth to find, most of these people are retired and the skills are fast disappearing.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DPI Quote  Post ReplyReply Direct Link To This Post Posted: June/01/2020 at 11:59
Bill,

Thanks for the info,
I am assuming that I will need to apply heat to these to soften the wax, similarly to the CF41 turrets.

I have got most of the loose flakes out with compressed air, via the ocular and objectives. If these plates are as delicate as you suggest, then it might not be worth trying to remove them, as there is no immediate need. Seems odd for something that was to be handled by the naval version of 'Squadies' Things need to be Soldier proof.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rdnzl Quote  Post ReplyReply Direct Link To This Post Posted: July/27/2020 at 19:05
Last pair of those I saw in person was a disaster. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WJC Quote  Post ReplyReply Direct Link To This Post Posted: July/28/2020 at 11:44
R U Nutz? Nothing is "soldier proof."

When I was doing night-vision gear at Joint Base Lewis-McChord, I found that some soldiers were demanding to have the SAME ANPVS-14 before each new patrol because they claimed they weren't smart enough to turn a large focus knob with HUGE numerals.

I hope our next ground war will be fought with video games or cell phones. Wink

Bill
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kickboxer Quote  Post ReplyReply Direct Link To This Post Posted: July/28/2020 at 15:14
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