Dating an atmos clock
Until the 19th century clock cases were almost always made separately from the movement and are rarely signed.
The brand has hundreds of inventions and over a thousand calibres (movements) to its name, including the world’s smallest calibre, one of the world’s most complicated wristwatches and a timepiece of near-perpetual movement.
The famous glassblowers - doing what they do since 1586!
- created a special double layer glass dome so complicated to produced that only the six most talented glassblowers at the firm were capable of completing the process. The 276 x 276 x 272 mm clock weights over 10kg and the dotted exterior allows for viewing of the incredible JLC caliber 560a Atmos movement.
19th century retailers and distributors often put their own names on clocks as an attempt to 'brand' their product.
The actual movement may have been made by someone else.
Jacques-David Le Coultre, Antoine’s grandson who was responsible for production at Le Coultre & Cie., accepted the challenge, giving rise to a collection of ultra-thin pocket watches, including the thinnest in the world in 1907, equipped with the Le Coultre Calibre 145 [see section 1.4.4].