Description: Gilt brass, front wound, verge fusee movement (39.62mm diameter). Silver regulator dial and blued steel regulator hand, quite big sized two-footed cock with big steel cockerel. Featuring square baluster pillars. Backplate signed ‘J(ulie))n Le Roy A Paris’ and numbered ‘303’. Enamelled copper dial ‘I(ulie)N LE ROY A PARIS ‘. Copper winding hole and movement latch protection.
Additional Info:
This is one of the oldest, numbered piece known by Julien Le Roy. This movement shows already the ‘sink holes’ to retain oil at the tip of the wheel axes invented by Julien le Roy in the 1720s, but this movement predates the invention by Julien Le Roy of the adjustment bracket for the crown wheel introduced by him in 1730 and which was adopted by all French watchmakers by 1735. This important invention suddenly allowed to adjust the play between crown wheel and escapement without the need of dismantling the whole movement. This adjustment bracket is not found in English pieces.
The dating of this movement is made by comparison with the production numbers collected and listed by Brusa, Allix, Sabrier and Chapiro.
Antiquarian Horology 
