9549

E. R. Watts & Son (Maker)

Invar tape on wooden reel, marked 101V. For connecting levelling measurements from the cornice and Whispering gallery to the cathedral floor

1920 - 1925

invar, Wood

ERW&S [in prism]/ TRADE MARK/ E. R. Watts & Son/ Engineers' & Surveyors' Instruments & Materials/ 123 Camberwell Rd, London, England101/V