A fantastic Georgian period mahogany zograscope of large proportions, c.1780-1800.The zograscope is an 18th century optical device that enhances the sense of depth in flat pictures to create a form of ''virtual reality''. The viewer would use specially prepared prints (''Vues D''Optique'') which had strong architectural perspective for maximum effect. However the zograscope will create the ''3D'' effect with 2D standard prints that have a strong perspective (please see the photo of a viewed George Baxter print by way of example).The zograscope was considered the height of technology in its time and as such, they are usually finely made with turned wood and inlays, ready to show off to guests during parlour entertainments.This example has a turned wooden base below a brass band, an extendable stem, inlaid viewing magnifier, original adjustable mirror plate and brass urn finials. The original mirror plate has some foxing but remains fully useable for viewing. There looks to b...