- [nb-NO]Object number[nb-NO]9558
- [nb-NO]Creator[nb-NO]E. R. Watts & Son (Maker)
- [nb-NO]Description[nb-NO]45 degree set square in fitted case, for offsets for plumb lines
- [nb-NO]Date[nb-NO]1920 - 1925
- [nb-NO]Object name[nb-NO]
- [nb-NO]Material[nb-NO]
- [nb-NO]Dimensions[nb-NO]
- set square side Length: 61 cm
hypotenuse Length: 86.3 cm
case side Length: 72 cm
case side Length: 101.8 cm - [nb-NO]Documentation[nb-NO]
- E. R. Watts & Son, LondonERW&S in prismNumbered 1to 1.9 ft, marked in 1/10ths