John Harrison Sea Clocks

Our range of Sea Clocks are inspired by the great John Harrison. In each clock we have embodied at least three of the basic principles from Harrison's first Sea Clocks.
 
Perhaps his most well known invention is the unique escapement, which gives the clock its popular name, 'The Grasshopper'. The subtle and almost silent 'lock and release' action of the pallets permits them to work without oil (and consequently be free of the effects of changes in viscosity) and at the same time make it so enduringly fascinating to watch.
 
The Invar pendulum are linked at the back, which allow the clock to function ‘out of level’. Their gentle action gives each clock that restful quality which is typical of an earlier more tranquil age.

Moonphase Sea Clock

The Astronomer Royal, Edmund Halley (c1656-1742) was a proponent of the Lunar distance method for determining longitude. The observations and calculations required for this method took many hours and were prone to error. The hand painted Moonphase dial (each signed and numbered by the artist) on the Moonphase model symbolises this alternative method.
 
Our Moophase Sea Clock provides in the Moonphase dial a representation of the competition (Lunar distance method) he faced for the solution to the Longitude problem back in the 18th Century. Each Moonphase dial is hand painted by our artist Keith Warrington, each with a hidden initial and date on each dial.
 
Almost every piece is made in the workshops of Sinclair Harding using a combination of modern technology, materials and traditional finishing techniques. Every care is taken at each stage in the making and build to ensure that the final clock performs to a standard, which justifies the association with John Harrison.
 
HEIGHT : 45cm. WIDTH : 32cm. DEPTH : 21cm.

Standard ‘Hers’ Sea Clock

Two styles of clock are available they are named “His” and “Hers”. As with all Sinclair Harding clocks a selection of finish and base materials can be specified to make your clock a very personal piece.
 
The engraved dials are hand silvered as they were in Harrison’s day. The unusual seconds hand special study, it sweeps through 240 degrees going from 0-60 seconds before vanishing, only to reappear instantly at zero again.
 
Almost every piece is made in the workshops of Sinclair Harding using a combination of modern technology, materials and traditional finishing techniques. Every care is taken at each stage in the making and build to ensure that the final clock performs to a standard, which justifies the association with John Harrison. All the parts on each clock are hand finished (even the ones you cannot see!) and all the Brass parts are protected with a thin layer of Gold or Rhodium.

Height: 45cm Width: 32cm Depth 21cm

Standard ‘His’ Sea Clock

The clocks are normally mounted on a base figured with Walnut or Rosewood. The base is then French polished which is generally recongised as the finest finish that can be applied to wood.
 
The 8 day movement is protected by a framed glass shade which is available with a beveled glass shade with an opening door. 
 
Each clock is individually serial numbered, we are confident of our quality that each clock comes with a guarantee for the lifetime of the original owner.
 
Height: 45cm Width: 32cm Depth 21cm

“Each clock is individually serial numbered and so confident are we of our quality that each clock comes with a guarantee for the lifetime of the original owner.”


Chain Driven Fusee
Chain driven fusee, 8 day power reserve. 

Dials
The engraved dials are hand silvered as they were in Harrison's day. The unusual seconds hand deserves a special study. It sweeps through 240 degrees going from 0-60 seconds before vanishing, only to reappear instantly at zero again.

Moonphase Dial
Each Moonphase Dial is handpainted, each signed and date by our artist Keith Warrington. 

Glass Shade
The clocks are protected by a bevelled glass shade with an opening door allowing the winding to be carried out without having to remove the shade.


French Polished Burr Walnut Base 

French Polished Birds-eye Maple Base

French Polished Rosewood Base 

Star Galaxy Base

General enquiries

Contact info

SINCLAIR HARDING (UK) LIMITED
Phillips House,
Chapel Lane,
Emley,
West Yorkshire,
HD8 9ST,
England

Tel: +44 (0) 1924 840 666
Email: info@clockmakers.com

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