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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area 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
