Full Details

Name and Model Number Blundell Vector
Country of Origin England
Date of Manufacture  
Front Scales {A[2 lines] B} { 2 templates } {C [ 2 lines] D, E [F, G, H] I}
Back Scales None
Scale Length 25 cm
Type of Rule Instrument
Construction Plastic
Area of Use Electrical
Comment Allows usual slide rule operations together with transformations
required in the use of real and complex electrical networks.
Enables the following:
(a) Conversion between polar and rectangular co-ordinates
(b) Multiplication/division of complex quantities
(c) Expressions of the form: sqrt (A12 + A122 + ...)
(d) As (c) but where An are reciprocals.
(e) Trig functions
Rarity RRR
Donor Collection of Rod Lovett
Match Number 15

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.