Strange lenses produced by GOMZ

Hello,
I recently received those lenses.
Two lenses and something that looks like an attachement (it does not form image).
For now, my actual hypothesis is that it's lens for Comparator system (also named "profil projector"), kind of optical mesurement system. But I didn't find any info about those particular lenses, and the use of this "attachment".
I would be glad if someone ever heard about something like that.

https://img-fotki.yandex.ru/get/249479/18405597.9a/0_17ae88_67c6b770_XXL

GOMZ, №500001, name "OK", 600mm, 1:10 . It's composed of 2 glasses (not a doublet). Does not create image.

https://img-fotki.yandex.ru/get/249307/18405597.9a/0_17ae83_ae212695_XXL

https://img-fotki.yandex.ru/get/202385/18405597.9a/0_17ae84_6016352a_XXL

https://img-fotki.yandex.ru/get/233740/18405597.9a/0_17ae85_a9da3abd_XXL

https://img-fotki.yandex.ru/get/249078/18405597.9a/0_17ae86_9c2e33c6_XXL

https://img-fotki.yandex.ru/get/202385/18405597.9a/0_17ae87_27e64594_XXL

x20 №2997 . It has a lot of glass inside, and almost cover 24x36 (good quality image)

https://img-fotki.yandex.ru/get/202385/18405597.9a/0_17ae81_a30aedff_XXL

https://img-fotki.yandex.ru/get/479589/18405597.9a/0_17ae82_84b4115a_XXL

Sample on Sony A7 :

https://img-fotki.yandex.ru/get/479589/18405597.9a/0_17acdb_4cec94ff_XXL

x50 №2997 . It also has a lot of glass inside, but cover like a 8mm cine lens (still good quality image)

https://img-fotki.yandex.ru/get/236988/18405597.9a/0_17ae7f_50ea0385_XXL

https://img-fotki.yandex.ru/get/370413/18405597.9a/0_17ae80_8a87f523_XXL

Sample on Nex-3 :

https://img-fotki.yandex.ru/get/217607/18405597.9a/0_17acdc_d0632ded_XXL

Oh, and those lenses are big (if not visible on image) and heavy. Both long lenses weight around 1500gr. Here is x20 on my A7 :

https://scontent-cdg2-1.xx.fbcdn.net/v/t1.0-0/p480x480/21231736_10159262105520243_3624675645791984193_n.jpg?oh=883a06fca9b0e4728d5d28e4de9cbc5a&oe=5A1ADE20

Best reguards,
Pierre

They look like oculars to microscope but they are much bigger.

Very strange.
Parts for telescopes?

The lens x20 seems to have a slope at the back, like for a rangefinder? Anyway, your photo is very good, with an interesting bokeh. Which length of bags did you put on your A7 to get the photo?

Jacques.

About the giant microscope, it was my first thought when I saw them [:D]

Jacques, there isn't any moving part on thoses lens, no focus system, so I guess nothing related to something coupled by rangefinder.
The focal flange is quite long, I think around 20cm (the lens on the photo does not sit in the bottom of the metal glass, only the first raw of screw hold the back of the lens).

The general weariness of the metal is interesting too, as if the two lenses x20 and x50 had been exposed at strong conditions...

Jacques, you're right.
I found those things in Ukraine. On the photos made by the owner, they were on the grass, totally wet in a datcha's garden. It was the heritage of his father, looks like he considered it like garbage or something. So I believe they have been outside for a very long time. I had to write him several times to ask him several photos , but often was not possible (not at home, too busy, etc...) and when I got photo (after like a month), quality was very poor. So I bought it blind. When I received them, I was pleased to see it has inscriptions with GOMZ logo and such serial number. Also, despite the rust, the screws and rings were fully working. I cleaned the lenses very easily, and lenses themselves were not in bad condition, no scratch , no fungus, only very dirty. Inside the bodies is clean like new. Only the rear lens of the x20 has lost coating. So I think they just long time been untouched at the back of the garden, that could explain this very "vintage" look :) .

I love when it is possible to get a part of history from a seller!
Great finds, Pierre. Alas, I cannot help you...