Mining compass screw

An image showing 'Record Shot - Do not reproduce.'

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Mining compass screw. Half of the thread appears to have sheared off sometime in the past. The screw (when unbroken) may to have fit in the base of the compass. Contained in a bag

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Object Details

ID:	NAV0372.3
Type:	Mining compass screw
Display location:	Not on display
Creator:	Unknown
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Bag: 7 mm x 75 mm x 100 mm
Parts:	Bare Needle Type (Mining compass) Mining compass vernier (NAV0372.1) Mining compass vernier fixing knob (NAV0372.2) Mining compass screw (NAV0372.3) Bare Needle Type (Mining compass box) (NAV0372.4)