English, dated 1843, signed in script to the top of the bar-limb ‘Powell & Lealand, Makers, London’, of standard No.3 construction, standing on a large lacquered tripod base with circular feet each with cork pads, trunnions to the top supporting the body, with large plano-concave mirror to the base as typically supported on one side on a sliding collar, above which collar, with a Turrel-type mechanical stage with X-Y control, main course focus to rear of body, bar-limb incorporating fine focus lever mechanism to the side, nose piece with prism blanking plate, limb with threaded boss to accept binocular or monocular tubes, the microscope comes with the following accessories in a fitted mahogany case:

A 1in objective, Lieberkühn & can.
A 1/2in objective, Lieberkühn & can.
A 1/4in objective, Lieberkühn & can.
A 1/8in objective & can.
A high power eyepiece.
A pair of medium power eyepieces.
A pair of low power eyepieces.
A pair of eyepiece extension collars.
An achromatic substage condenser signed.
3 darkwells.
2 liveboxes .
A leather case with a binocular prism.
A substage wheel of stops
Stage forceps
a stage bulls-eye condenser
A pair of binocular bodytubes

In a fitted mahogany case with key.

Provenance
the microscope comes with a calling card for ‘Sir Thomas Watson, 16 Henrietter St, Cavendish Square’, to the rear of the card in pen is written ‘Bequeathed to Dr George Johnson’. This claim is backed up with a copy, which accompanies the microscope, of Sir Thomas Watson's original will which states ‘I give my microscope by Powell & Lealand to Dr George Johnson of Savile Row, London’.

Sir Thomas Watson, 1st Baronet, (1792 – 11 December 1882) was a leading British physician, he studied medicine at St Bartholomew's Hospital and Edinburgh and graduated M.D. from Cambridge University in 1825. He was appointed physician to the Middlesex hospital in 1827 and was professor of clinical medicine at the University of London before transferring to King's College as professor of Forensic Medicine he also became Queen Victoria's private doctor and was created a baronet in 1866.

Another calling card accompanies the microscope which states ‘Bequeathed by Sir G Johnson to Sir N. Tsard and by him to K. C. H. medical school’