Rangefinder

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rangefinder in wooden box containing tommy bar, screwdriver, and two spare mirrors. Also book of instruments in Japanese.

Scales: 1. Height scale on spring-loaded index arm graduated from 18-60 in black figures and from 9-18 in red figures.
2. Range scale on micrometer drum. Various figures and Japanese symbols.

Horizon glass:Perpendicular adjustment by means of screw on back of mirror. Parallel adjustment by means of capstan screws

Index glass: Perpendicular adjustment by means of screw on back of mirror.

Micrometer drum: Attached to carriage which moves alongside index bar by fluted knob on carriage. Locking device for drum.

In fitted wooden box 11.5" x 6.5" x 5.3" (29.2 x 16.5 x 13.5 cm) containing tommy bar, screwdriver, and two spare mirrors. Also book of instructions in Japanese.

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Object Details

ID:	NAV1088
Type:	Rangefinder
Display location:	Not on display
Creator:	Unknown
Date made:	circa 1940
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 115 mm x 255 mm x 137 mm
Parts:	Rangefinder Rangefinder mirror (NAV1088.1) Rangefinder mirror (NAV1088.2) Rangefinder mirror box lid (NAV1088.3) Rangefinder mirror box base (NAV1088.4) Rangefinder screwdriver (NAV1088.5) Rangefinder tommy bar (NAV1088.6) Rangefinder instruction booklet ? (NAV1088.7) Rangefinder box (NAV1088.8)