Two lenses for ?

I bought 2 lenses many years ago. Optical constructions are well known.
But what are these lenses for ?
They don't have aperture nor focusing ring.

replacement lenses for repairs

Reading microfilms/microfiche, film-editing tables, etc. projection purposes.

http://xalmaz.narod.ru

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Reading microfilms/microfiche, film-editing tables, etc. projection purposes.

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Not quite, Belomo made triplets for that purpose. These are really spare optical units with functional apertures. I bought some of them to revive Jupiter 8 lenses with broken optics. One of these hybrid lenses is now fitted on my Zorki 6.

My lenses don't have apertures but there are free place for blades.
Nevertheless it is good to know lenses fit regular Jup 8 and Jup 12.