Fixed focus lens, produced between 1958-1966, was very small and lightweight with an unusual bayonet hood. Apertures from 9.5 to 22. Rear filters have 37.5mm size. Both cap and hood are bayonet type, the complete set includes a UV filter on the lens, a yellow one, and a small unscrewing tool all in a faux-leather container. An orange filter could be purchased separately, and it’s rumored to be the rarest Minolta accessory.
Please note how the rear filter is intended as part of the scheme, (7 / 5) hence “PG”.
Minolta UW Rokkor-PG 18 mm, 1:9,5
First Minolta fisheye, fixed focus.