Circa 1850
Engraved to the foot 'AND.W ROSS LONDON NO. 102', with two additional cased lenses engraved '1/4 H.Crouch London' and '2in. H Crouch London', 36cm high, in a mahogany veneered box with brass carrying handle; Together with various specimen slides in a pine box, 21cm x 20cm x 8.5cm