Otis King's Patent Calculator Model L
Long but compact herical slide rule. More accurate than a 10 inch rule, though I'm still a little fuzzy on how the cursor system works, not having one to handle.
Jan 07 · 4 months ago
Otis King's Patent Calculator Model L
Long but compact herical slide rule. More accurate than a 10 inch rule, though I'm still a little fuzzy on how the cursor system works, not having one to handle.
Jan 07 · 4 months ago