Waddington's Lord's Calculator Circular Slide Rule
A Waddington's circular slide Rule, 'Lord's Calculator' made circa nickel plated case (AF-case wear verso) dial marked 'Lord's Calculator, R. Waddington, Coventry'. Diameter 2.76 in.
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- Verso - Verso is the "back" side of a sheet of paper, art work, coin or medal. The front side is "recto".
- Circa - A Latin term meaning 'about', often used in the antique trade to give an approximate date for the piece, usually considered to be five years on either side of the circa year. Thus, circa 1900 means the piece was made about 1900, probably between 1895 and 1905. The expression is sometimes abbreviated to c.1900.
This item has been included into following indexes:
- slide rules 10
