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Other Instruments by Ross

 

English Prism Binoculars

Signature Ross, London

Date Early 1900s
Dimensions English Metric
Height 2.0in 51mm
Extended Length 3.9in 98mm
Closed Length 3.5in 90mm
Interpupilary Distance (min) 2.3in 59mm
Interpupilary Distance (max) 2.8in 70mm
Objective Clear Aperture Diameter 0.6in 15mm

Description

These early Porro-prism binoculars have a brass housing and indicate an optical power of 4X.  The binoculars show a serial number of 7476 and a patent date of 11-7-1900.  The main housing is leather covered.

 


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