Louis Erard 1931 Open Tonneau Moon Phase

Swiss watchmaker Louis Erard has launched an open-worked version of its 1931 Tonneau Moon Phase watch.

The fine openwork of the guilloché dial reveals a skilfully-made mechanism that activates the day, month and moon phase discs, while the gear-trains evoke the film Modern Times, another masterpiece combining retro and modernity.

The curved sapphire crystal conveys a sense of size and luminosity to the whole piece. The micro-mechanical engine beating inside this stainless steel watch is the automatic ETA 2824 calibre with Dubois Dépraz 9000 module.

This new watch comes with a completely open transparent tonneau glass revealing the sophisticated movement within, as well as the delicate Côtes de Genève decoration.

The Louis Erard 1931 Open Tonneau Moon Phase watch is available in two open-dial variants: Silvered and black. It displays the date with a centre hand, the day at 10 o’clock sub-dial, the month at 2 o’clock sub-dial and the moon phase at 6 o’clock.

Technical details

Model: Louis Erard 1931 Open Tonneau Moon Phase

Automatic mechanical, ETA 2824 calibre with Dubois Dépraz 9000 module

Hours, minutes, seconds, day, date, month and moon phase

Stainless steel
Curved ant-reflective sapphire crystal
Transparent back, Côtes de Genève decoration
Water-resistant to 50 metres

Silvered or black skeleton with silvered indexes
Hours, minutes, seconds and date at centre
Windows: day at 10 o’clock, month at 2 o’clock
Moon phase at 6 o’clock

Chocolate or black genuine leather with steel folding clasp