Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Circular and Spiral Slide Rules
Unknown / Simple Interest Rate
Unknown
possibly USA
Plastic
1968
Ø 8.9 cm
Business

Notes: Copyrighted design by J.B. Maillie that does what it says on the tin - calculates the total interest owed on a loan for interest rates from 5.5% to 50%.


Image 1




Image 2