Webb's "Adder", patented 1889, with cover
- Made:
- 1889-1900
Webb's "Adder", patented 1889 with cover
Details
- Category:
- Mathematics
- Object Number:
- 1933-360
- type:
- adding machine (stylus)
- credit:
- Professor W.C. Unwin
Parts
Lid for Webb's "Adder"
- Object Number:
- 1933-360 Pt2
- type:
- adding machine (stylus)