A large spy-glass signed, James Wallace, Glasgow’. There is not much written about James Wallace although he is noted in Websters Signature Directory. The optics are Galilean with an achromatic main lens. This gives a fairly high magnifibation but a limited field of view. Open, it measures 8″ (20 cms) and closed, 5.25″ (13 cms). It is in good condition, no dents, good undamaged lenses. Circa 1850.
Ask the Dealer
I live in Lancashire (U.K.) and have been a dealer and collector of scientific and nautical instruments for a number of years. My stock has included some fine items from museums and colleges, which were surplus to their requirements. I occasionally purchase some interesting items from abroad, having established some reliable sources.