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.

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.

John Harrison Sea Clocks – ‘His’ & ‘Hers’ Sea Clocks

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.

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, or a framed glass shade which incorporates a winding hole to avoid having to remove the shade each week.

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.”

Details

Standard His & 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.

Each clock is individually serial numbered and is protected by a framed glass shade – not shown.

Sea Clock Bases & Shades

The clocks are normally mounted on a base of selected figured mahogany or walnut, inlaid with Brass on to which the winding key and hand setter are attached. The base is French polished which is generally recognised as the finest finish that can be applied to wood.

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.

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.

The 8 Day Movment

The 8 day movement is protected by a framed glass shade, which incorporates a winding hole to avoid having to remove the glass each week, or a glass shade with an opening door can be provided if desired.

All parts of each clock are hand finished (even the ones you cannot see!) and all the solid Brass parts are protected with a thin layer of Gold or Rhodium.

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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