On closer inspection there is a name written inside the manual, the box has "BASEMENT" written on the outside, and there is an extra SR4mm eyepiece that was not original equipment but may have been purchased at the same time, as it is marked on the back side of the manual, where there is a list of optional accessories. So probably set up once at home, allowed to get dusty, and carefully put away. Nearly 60 years ago.
The finder scope has no marks on it, other than some paint oxidation. No set screw marks. I bet it was never aligned. All the caps and covers are still there: Barlow, diagonal, visual back, dew shield, etc., as well as containers for all the eyepieces.
The other eyepieces are H 12.5mm and H 6mm. There's a hobby killer set up. I'll bring my daughter a Kellner 21mm for a more pleasant viewing experience. We are visiting her for the first time in her new house next weekend. She's a middle school teacher and very much into vintage stuff, so she will appreciate this scope for what it is.
Edited by norvegicus, 16 May 2021 - 12:08 PM.