Trade card: advertisement for Abraham & Dancer, 13 Cross Street, King Street, Manchester, manufacturers of optical, mathematical and philosophical instruments, achromatic microscopes, new and improved self-acting electro-magnetic machine, for medical purposes...; . n.d. [1842] trimmed to 9x11cm conserved backed and edged to 12x14.5cm. (Calv. 4) (C.C. 66)