Details and Image
|Date||Scale Length||Area of Use
|Linear||G1||Blundell ||England||Bakelite||about 1947||25 cm||Basic Calculation
Notes: "This was one of Blundell's earliest slide rules, manufactured from bakelite. See article J. Oughtred Soc. 19(2), p. 17, 2010: Rance, The mystery of the disappearing bakelite."