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Bausch & Lomb 7 x 50 wide field - 1945
The binocular was manufactured by Bausch and Lomb Optical Co., Rochester, N.Y. It was designated by the Navy as Stock No. R88-B-309 Mark 41, and by the manufacturer as 61-21-39 Binocular. This
description is engraved on the right top plate.
The binocular was designed for observation with a large field over the surface of the ocean and it covers field view of 175.3 meters at 1000 meters, at 10 degrees.
The body is made from aluminium, with a hard textured vinylite covering. Height - 130 mm; Width - 220 mm; Weight - 2100 grams.
The body shape gives the operator a firm grip.
The rubber headrest is attached to the covers of the binocular by four screws.
It is Porro I design. Each eyepiece assembly five elements. Each prism shelf mounts two prisms.
7 x 50 Bausch & Lomb Mark 41 - Handbook of Overhaul Instruction; in our collection
The binocular is in the original Bausch and Lomb carrying case with a shoulder strap.
Inside the case is an instruction and a warning for users: “Do not abuse” this instrument.
On the surface of the top cover is embodied the Bausch & Lomb logo.
The B&L factory data and catalogs contain dates of production. Letter ‘B’ pointed to 1945 year of
production, and second letter a product class designation. Letter ‘U’ stands for: Binoculars, spotting
scopes and rifle scopes.
Bausch & Lomb 7 x 50 wide field is the most desirable USA binocular ever built. The binocular gives a
fantastic picture.
The production number of the binocular is engraved on the bottom of the central hinge pin; bottom plaque.
Production number BU 4269.
On page 2 you can see the list of production numbers Bausch & Lomb, completed by Steve Stayton. The list of serial number is completed from Bausch & Lomb factory documents and catalogues.
The list is published by kind permission of Steve Stayton.
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The instruction inside the case
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Bausch & Lomb MK91 Mod 1 -1946
This model of Bausch & Lomb 6 x 50 was mounted permanently on submarine conning tower bridges and be to resist undersea pressure. More you can read on the article “U-Boat binoculars”
Production number 1808
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Biascope - Wollensak binocular - 6x
The binocular was developed in ca 1920 by Wollensak, the engineer of Bausch and Lomb.
It was manufactured by Wollensak, Rochester, USA.
The body is made from brass, finished with black paint .
It is Galilean field glasses - non-prism binocular.
The binocular power is 6. The objective diameter is 23 mm.
The little sliding focusing lever is working very well.
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Sard 6 x 42 - Wide field - Mark 43 New York
The binocular was manufactured by Kollsman Instrument Division of Square D Company, Elmhurst, N.Y.
It was designated by the Navy as Stock No. R88-B-303 Mark 43, and by the Kollsman type 836 CT manufactured.
As Bausch and Lomb binocular the Sard binocular was designed for observation with a large field over
the surface of the ocean.
The body is made from aluminium with a hard textured vinylite covering. Height - 95 mm; width - 220
mm; weight - 1712 grams. The rubber eyecups are fitted over eye lenses.
The binocular covers field view of 192.8 meters at 1000 meters, at 11 degrees 50 minutes.
The optical system is designed in the same way as Bausch and Lomb.
7 6 x 42 Sard Mark 43 - Preliminary Parts Catalog; in our collection
As Dr. Stephen Rohan says, in his book titled ‘A Guide to Handheld Military Binoculars 1894-1945’: “the
binocular could be attached to a special mount that was used on PBY’s catalina flying boat “.
It seems that except Navy stock numbers, the binocular does not have serial number.
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Page Back Page 1 (2)
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