- N° d'objet9549
- CréateurE. R. Watts & Son (Maker)
- DescriptionInvar tape on wooden reel, marked 101V. For connecting levelling measurements from the cornice and Whispering gallery to the cathedral floor
- Date1920 - 1925
- Nom d'objet
- Matériel
- Dimensions
- reel Diameter: 45.3 cm
reel Height: 3.4 cm - Documentation
- ERW&S [in prism]/ TRADE MARK/ E. R. Watts & Son/ Engineers' & Surveyors' Instruments & Materials/ 123 Camberwell Rd, London, England101/V