Bain & Ainsley “HA – HY” mahogany cased ship’s course corrector, circa 1900.
With retailers’ mark: T. L. Ainsley, Barry Dock & Cardiff.
See photos for instructions. Height when setup: 19 inches (48 cm).
For similar see the collections of:
Smithsonian National Museum of American History: Catalog No. 337211
National Maritime Museum: Object ID. ACO0657