Vintage Leitz Wetzlar 200mm Fast projection taking lens Focusing Tubes Hektor ?

Description

From the estate of a former MIT professor
Vintage Leitz Wetzlar 200mm Fast Projection or Taking lens mounted in a sophisticated focusing assembly, complete with original Leitz Germany lens cap. May  be a Hektor variant or other fast projection lens
Marked "Leitz Wetzlar Germany f=200mm Lens Made in Germany"
Lens diameter is about 60mm - a big hunk of Leica glass, super bright with no fogging or fungus. Lenses appear to be in at least 3 groups, not sure how many elements
There are 4 parts, all beautifully machined in aluminum - the lens tube, an outer helical focus tube to which the lens tube is attached by two gimbal screws, an inner helical focus tube, and the mounting tube (about 6" long") with an approx 52mm male thread for mounting to a case.  Overall assembled size is 6 5/8" - 6 7/8" long x 2 7/8" diameter
Very nice vintage condition.  Lens is absolutely beautiful- big and bright, with no fogging, fungus or separation. Tubes are wonderfully machined aluminum, fitting together smoothly and precisely. Both parts of the helical focus system are present.. No damage to threads, tubes or lenses. Original lens cap.
B-GRY-HPHOTO