Rare English tourbillon with up/down indicator Circa 1904

Gold open faced tourbillon lever watch by Charles Frodsham
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A fine and rare English 18 carat gold open faced tourbillon keyless lever pocket watch with up-and-down indicator, circa 1904. Gilt finished 3/4 plate fusée and chain movement with raised barrel engraved with Honour cyphers, the steel three armed Nielsen type 1 tourbillon carriage with double roller lever escapement and cut bimetallic compensation balance. Glazed cuvette. Silvered matte dial with Roman numerals, blued steel spade hands, large subsidiary seconds, up-and-down (wind indicator) below twelve o’clock. Heavy polished case with triple stepped bezel, turning pendant, five joint knuckle, raised push. Dial and movement signed and numbered, case stamped with maker’s mark HMF for Harrison Mill Frodsham and London date mark for 1904.
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Diameter: 59 mm
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Signed: Chas Frodsham. AD.Fmsz.08991 – Chas Frodsham AD Fmsz by appointment to the King  115 New Bond St. Late of 84 Strand London