NavList:

Luc thank you for that.

The Aßkamp bio provides some valuble insight into the details of manufacturer- I note the following from the description of the 'Gold sextant' as provided to Bobby Schenk:

"The following can be said about the development of this device: the frame was cast by the Reitzammer company in Fürth in September 1984, as were the mirror mounts and the mount for the telescope".

I have been working to track down the engineering approach to the sextant frames as offered by C Plath and Cassens & Plath.

Specifically I have an interest in the differences between the classic ladder frame and the single circular frame as offered by each.

Late in the game I see this variation of the circle as now viewed in this Aßkemp sextant but also used in the C Plath "traditional".

Given the note above I see that an independent? foundry is contracted by at least Aßkamp to cast the frames.

This leads me to wonder at the firm which was responsible for the design work and how it was arranged that both firms used this same casting in their sextants.

I do note that Cassens & Plath uses a different single circle design which at the present time is full CNC milled from blank (with I assume second order opperations to drill/ream and hob particulars).

I assume that same frame had at an earlier time was also cast in foundry - same foundry as used by C Plath and Aßkamp?

As a final note- the Bobby Schenk as now offered by Cassens & Plath is now provided on their milled frame of same design as the rest of the product line so it seems the aberration.. of the circular frame design as used prior by both C Plath and Aßkamp is now an extinct creature..