and slide rules
The 7 Objectives
3 Zentmayer objectives
reversible 3 inch and 4 inch (works only in the 4 inch position on the binocular, due to lack of clearance), 1 1/2 inch, and 8/10 inch.
Bausch & Lomb 4/10 inch
with adjustable front with scale from 0-12. Both case and lens are signed.
Unsigned 1/5 inch, 110°
(possibly J. Grunow), with adjustable front with scale from 0-12.
C.A. Spencer & Sons 1/2 inch, 65°
C.A. Spencer & Sons 1/8 inch immersion, 175°
Return to the Zentmayer Grand American