PT7555. Very early and unique sample of Jupiter-9 2.0/85 mm lens, released by Arsenal in 1957. Under name "Rekord-9" (another unique lens under name "Rekord-4" 0.95/50 mm is known to exist - see on the list). An only so far known sample to exist in collections.
Lens #570001 opposite from Yuriy Davydenko (Ukraine) collection.