Trade card: advertisement. Messrs. Davis, manufacturers of mathematical, optical and philosophical instruments, 65 Bold-Street, Liverpool and 101 High-Street, Cheltenham. n.d. [1842] 10x9.5cm conserved backed and edged to 12.5x12cm description of equipment offered for sale and made to order. (Calv. 116) (C.C. 121) Note: this is the obverse of 1934-121/10 Beard's trade card Messrs. Davis