This is a complete 81mm Secretan refractor. The alt az has slow motion control on the two axes. This is rather uncommon.
The slow motions are working very smooth. Hard to find a Secretan 81mm with the complete alt az mount.
In the 1930 telescope catalogue it is mentioned as a additional option.
The Secretan telescope is in very fine condition. It has completely cleaned, re-lubed and restored.
The views are excellent as you can expect from a Secretan refractor.