Spare part for Tarbet Ness optic

Spare parts for Tarbet Ness optic. Sixty-one threaded bolts. Forty-five bolts have a square head and a hollow shaft. Sixteen bolts have a square head with a dent in the centre and a hollow shaft. Contained in a cardboard box with '1 5/8 x 1/4 CYL' and '445 Hillingdon Rd, Hillingdon Ind Est Glasgow, SW1' handwritten on it.

Object details

ID: NAV0977.62
Type: Spare part for Tarbet Ness optic
Materials: Metal
Display location: Not on display
Credit: National Maritime Museum, Greenwich, London
Measurements: Diameter: 15 mm;Overall: 20 mm
Parts: Tarbat Ness Light (light, catadioptric)