- Objectnummer9559
- VervaardigerE. R. Watts & Son (Maker)
- BeschrijvingLevel no 8850 By E. R. Watts & son, London, In case with accessories
- Datum1923 - 1925
- Objectnaam
- Materiaal
- Formaat
- level Height: 17.5 cm
level Width: 38.5 cm
level Depth: 16 cm
Box Height: 17.5 cm
box Width: 41 cm
box Depth: 22.5 cm - Documentatie
- Side 1 - No 8850 ERW&S in prism; Side 2 - E R WATTS & SON LONDON; Side 3 PATENT NOS: 17944-1910, 18119-1910; 25622-1910; 33337-1920; PROV PAT 24154-1922.