Yup Gene, just the eyepiece slide/shutter is missing .
As far as company vessels go I have no records of that .
There were 7 brothers in my family during that era (mid-late 19thC); many of them I have no information on except all 7 fought in the Civil War ; maybe there is a military connection rather than Maritime ..
As for the scribed line; I live on a salt marsh about a mile wide .
The tele is usable to focus when set at the line; not in focus per se, but at least you can spot your object then focus finer .
I can see the passengers in the cars across the marsh quite well .
