Up for sale is a very rare Zeiss Topogon 25mm f/4 lens for the Contax rangefinder cameras. Comes with front and rear caps and Zenit turret finder and hard cases.
As for rarity, apparently this variant without the red 'T' is from one of the last batches of 85 lenses, according to https://www.mir.com.my/rb/photography/companies/nikon/nikkoresources/RF-Nikkor/Contax_RF/ContaxZeissTopogon25mm.htm
Cosmetically in very fine condition; see pictures for full details.
Optically in clean condition but does have a fair amount of dust.
Mechanically working as intended. Lens locks onto camera, focus and aperture can be adjusted.