I recently bought a bunch of old lab lenses from a supplier on Ebay.
One of the lenses in the batch was a Kodak Ekton f4,5 52mm Color Printing lens -short conj(unction?) - there is a "teleconverter" lens fixed to the front tube of the lens (with 3 small allen screws -like a cap going over the lens) which is enlarging by a factor of estimated 1,2-1,3 x.
The lens is with a fixed aperture of 4,5 and can be focused only by a long thread in a supplied lens holder. The weight is nearly a kg itīs made beautifully of massive brass and steel- I think it is either a 5 or more likely a 6 lens design.
I guess(and was also told so) it was used in a machine printer for color prints of an Agfa or Gretag machine, but searching the Internet did not get any results.If someone is interested I can also do a photo/s.
Does anyone have some more info on this lens(es), maybe some old Kodak spec from an ancient catalogue ? from the font on the front tube I would guess it is pretty old at least over 30-40 years. It looks like a very high quality lens, I am just trying to decide what to do with it.