Case for Otis King's patent calculator
Case for Otis King's patent calculator (a spiral logarithmic slide rule)
- Object Number:
- 1923-634 Pt1
- type:
- instrument case
Otis King's patent calculator in case (a spiral logarithmic slide rule)
Case for Otis King's patent calculator (a spiral logarithmic slide rule)
Otis King's patent calculator (a spiral logarithmic slide rule).