English silver verge day and night pocket watch Circa 1690

Oignon pocket watch with retrograde time display
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An extremely rare and early handless ‘Oignon’  watch with retrograde time display and day and night indication, made by Massy in London, England, circa 1690. The open faced case of this watch is crafted from silver, has a winding square on the back, concealed by a rotating cover, a master’s mark AM and a crown. The exceptionally beautiful silver dial has a rotating day and night disc with arrow hands for indicating the time and the movement has a very early English verge escapement with special pillars.
The dial and movement are signed.
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Diameter: 47 mm
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Weight: 102 g
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Signed: Massy, London
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Massy
Massy is an English watchmaker from around 1700.
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The handless version of the watch presented here is very rare. Most of these watches have a minute hand and a revolving minute scale, but this watch does not. The time is shown only by the rotating disc and the arrow hands. The central square is only used to set the time.