Patent section line ruler, stamped "Apps", with trademark and case

Made:
Chemnitz
supplier:
Alfred Apps

Patent section line ruler, stamped "Apps" and with the trade mark of E.O. Richter and case.

Details

Category:
Mathematics
Object Number:
1911-198
type:
rule (line)
credit:
Thomas H. Court

Parts

Case for patent section line ruler

Case for patent section line ruler

Case for patent section line ruler, stamped "Apps" and with the trade mark of E.O. Richter

Object Number:
1911-198 Pt1
type:
instrument case
Patent section line ruler

Patent section line ruler

Patent section line ruler, stamped "Apps" and with the trade mark of E.O. Richter

Object Number:
1911-198 Pt2
type:
rule (line)