International Workshop BD
D. Lehn Hilton's second unknown slide rule.
“Made in U.S.A.”
Click image for magnification
Data:
- 12.5cm long slide rule
- only “Made in U.S.A.” on the face
Question:
- Manufacturer, date, target market, etc.
A Bruning 2401 shows the same cursor:
Eamonn Gormley
Bruning also manufactured items for Post