From: David Pike
Date: 2015 Aug 30, 16:42 -0700
Having just signed in again having researched and drafted the post below, I see it crosses with Bill Morris. I post it anyway, because it is slightly different.
Bingo! There were such things as sextant binoculars http://www.fleaglass.com/ads/sextant-binoculars/ . Plath supplied a skinny frame model with them http://www.la-timonerie-antiquites.com/en/antique/442/large-sextant-german-c-plath-hamburg , but how did the Plath binoculars screw in? They don’t appear to have any way of being attached to the sextant. The double eyepiece ring might be a clue. Unscrew the focussing wheel completely push one eyepiece through the rings and reassemble. I suppose it’s worth a try. Dave