1851 Great Exhibition: Official Catalogue: Class X.: James Gowland
27. GOWLAND, JAMES, 52 London Wall — Inventor and Manufacturer.
Improved free pendulum regulator, for the isochronal division of time.
Patent tourbillon remontoir chronometer, in which the impulse is imparted to the balance through the balance spring, its stud being advanced one degree or tooth of the locking-plate at each oscillation.
Large model of the escapement.
Model of Earnshaw's escapement.
Skeleton clock with improved compensation pendulum. Model of an improved anemometer and wind-dial and vane; and of an electric clock.
Various specimens of watches, including gold keyless hunting lever watch, winding and setting the hands through the pendant, and also unlocking the cover of the case by the same means.
A gold keyless repeater, indicating the hours, quarters, and minutes, etc.