- Object number9554
- CreatorE. R. Watts & Son (Maker)
- DescriptionInvar tape on wooden reel, marked 55 ft
- Production date1920 - 1925
- Material
- Dimensions
- reel Diameter: 46.7 cm
reel Height: 3.1 cm - Documentation
- InscriptionERW&S[in prism]/ TRADE MARK/ E. R. Watts & Son/ Engineers' & Surveyors' Instruments & Materials/ 123 Camberwell Rd, London England55-0ft