This is a particularly well preserved example from the experimental period in the middle of the 18^th century.  Cheetham classifies this type as “improved field non-achromatic terrestrial”, but this is closer to the original Schryle optical system.  Two biconvex eyepiece lenses are placed close together, with a biconvex erecting couple spaced out in the more familiar pattern.  The objective (stopped down to about 12-13mm) is plano-convex, with the plane surface outermost. The objective shutter is an unusual (but not unknown) early design, not being recessed as later 18^th century models were.

The image is clear, but not bright, the eyepiece arrangement appears to be to improve magnification rather than field.  The magnification is about x12, without noticeable aberration.

Condition:  Excellent. Lenses without damage. Mahogany barrel with two, short, hairline shrinkage cracks, the lacquered brasswork retaining the majority of its original lacquer.  The tubes with some dark patination, no signs of ever having been polished.  Screw threads excellent. Shutters operate nicely with their original springs.  In all, the telescope has had very little use, and hand held telescopes from this period are usually well-worn.  The draw tube has four small holes drilled in the end, where at some time an owner has attached a tube retention (now absent, and originally there would not have been one). Size: 13.5 inches (34cm) closed 21.5 inches 55cm focussed on infinity.  More photos on request. Ganymede stock no. 35-3711