An English mid 19th Century rare close-plated narrow rack four-pillar King's screw
with turned bone handle and turned ivory side handle, no brush, some minor hairline cracks in handles, domed cage top, the bell collar with unidentified maker's mark I.H. or T.H. in script struck twice with device between, plating worn in places, rack and pinion mechanism slightly defective in one position, wire helix.
See Front Cover Illustration