Title
Slide ruleCatalog Number
102631891Type
Physical objectDescription
The object consists of a slide rule and case. Written on the back in pencil is "W F BACKHOUSE".Date
1935 ca.Manufacturer
Faber-CastellPlace Manufactured
GermanyIdentifying Numbers
Model number | 398 Elektro | |
Other number | S441 | Donor's ID number for rule |