Full Details

Name and Model Number Aristo 816 Piccolo
Country of Origin Germany
Date of Manufacture 1971
Front Scales cm/ DF [CF, CI, C] D, A
Back Scales None
Scale Length 10.0 cm
Type of Rule Slide Rule
Construction Plastic
Area of Use Generic
Rarity RR
Donor Collection of Rod Lovett
Match Number 10

RR = Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace.   
RRR = Very rare -- only very few known to collectors; may take several years before one comes up for sale.   
RRRR = Extremely rare -- a museum piece; unlikely that an example will ever come up for sale.