Impressive, and if restored optically this could be a real planet-killer.
Are the eyepieces complete with glass elements ? If so take care of these as they add significantly to the value of it, even if you choose to use modern eyepieces for observing. What’s more, while the fields of view will be very limited and the eye relief more or less nil, if they were well made they could be very good on-axis.
Are there any marks on the eyepieces to suggest their origin ? It could be as small as a single “makers mark” like a letter stamped in the metal somewhere.
The pieces in the third photo ... the yoke and a gear wheel... two questions for you:
- does the tube fit between the arms of the yoke ?
- is the rectangular object at the bottom of photo 3 some sort of counterweight ?
The reason I suggest this is that in photo #4 the OTA has two bars sticking out sideways and I’d expect these sat across the arms of the yoke, providing an altitude adjustment. In In this arrangement the tube is usually a bit unbalanced and some means of restraining it was used to control the altitude - could have been anything from a piece of string on a roller (like a fishing reel) or a long rod with an adjusting screw, so keep your eyes open for bits that don’t seem to fit at first.
I’d also guess the gear wheel was for azimuth adjustment and there was a pinion for driving that, manually operated.
If so then I think it was mounted altaz with the yoke sitting flat on top of a pier or tripod, and the tube cantilevered out on one side, rather like the Berrmount for refractors.
See
http://ejamison.net/refractordobmounts.html for example.
This predates Berry by many decades which just goes to show some ideas are not entirely new.