Lot of 1940s optical tubes, eyepiece components, and extensions. All USA

Auction No.:
Spokane Vly, WA - US
Andy Sedlacek
12/02/2019 08:54AM
12/12/2019 08:54AM
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This will be a long description, but we need to be as descriptive and correct as possible so you are not misguided.

These all came to me in a bin lot back in 2010 and I have kept them around trying to piece them together or find individual uses for them. Now with 2019 ending, I have still not fulfilled my goals with these pieces, so they are all going into one lot for you to play with.

Please note that the pieces that work with each other ARE BUNCHED together in the first photo. If they are not next to each other, they do not work with those other components

Parts 1)  The long, military-green telescope tube is, you guessed it, a Sherman Tank target sighting scope. It is incomplete and parts of its pieces have been sheared-off, or as in the smaller lens piece, was tinkered with at some point with added tension inserts. The glass on all of this is usable, but the pieces will not marry because of the aforementioned issues.

W.E.M. Co. was the manufacture of all these parts. ALL are made of solid milled steel. All glass is fully coated and from the same unit, dated 1943.

Main scope:  still has inner image correction orientation lens assembly. Weighs 1 pound 6 ounces.
Long sheared extension:  37mm aperture lens. Weighs 11 ounces.
Medium sized insert:  Piece # E 7636682. Single element 31.4mm diameter lens. Weighs 4 ounces.
Smaller insert:  Piece # 7636684. Thick, single lens element 31mm diameter. Weighs 3 ounces. Threads are good on this piece.

Parts 2)  Freeman refractor parts. This was either a long spyglass or a zooming telescope; clearly a refractor.  Though not all parts are engraved "Freeman", they all share the same gauge thickness brass, exact matching hues of patina, and lens coatings. Also, the grooved friction grips on the rims of (2) of the pieces are a match. I would NOT be the least bit surprised this goes back to the 1920s or earlier.
ALL these pieces are solid milled brass.

Extension tube:  4 ounces. Tension slits are stock and holds 1.25" barrels. Outer barrel diameter is 1.37". It is 3.08" long.
Barlow or image corrector:  5 ounces total weight. This piece is actually (2) parts that unthread is needed. Fits in 1.25" barrels. Lens is a doublet fully coated convex. Total length is 2.48".
Eyepiece:  2 ounces. 1.25" barrel. Stands 1.45" tall. Exit pupil is 3mm. Fully coated and gives about 35-deg fov. Likely a Ramsden.

Parts 3)  These are unknown parts with no real reference. But they did come from the same telescope or sight scope they served.  Both pieces are solid milled brass.

Doublet lens extension:  numbered "B-269693". Weighs 7 ounces. Has a lens aperture of 22mm and the glass is fully coated. It is 4.21" long and 1.16" wide.
Eyepiece:  The words "LOW" are engraved on the rear by the exit pupil. Weighs 3 ounces. Highly likely a kellner. Rear glass is 25mm diameter and the front glass is 13mm, though because of an aperture stop, would measure more as 9mm. Optics are coated. Total length is 2.15" not counting the protruding measurement of the glass. Main barrel diameter is 1.09".

Parts 4)  These are the thread-on extensions of a greater scope; again highly likely a zooming scope or a spotting scope; either way a refractor design. No optical glass is included. The maker is "D Paul Shull" and though not much is known, this was a telescope sold on various ad classifieds, like those in the once well-known Photographic Market Place. Or in magazines like Popular Science. I would strongly date this telescope part from the 1944-1947 years.

This is really (4) extension tubes which all thread (if you wish) into one, long tube. All extensions are solid milled brass with black crackle paint finish. Total length is 8.2". Total weight is 9 ounces. 

ANY of the glass involved is in good condition at best. It is old, dusty, with some scratches, but no fungus damages. All of it will need to be cleaned in the least before being incorporated into your various optical plans.

Because of the length of the tank sight tube, these parts CANNOT GO medium flat box priority.

All nations welcome to bid.