French important oval single-handed watch Circa 1620

Oval single-handed watch with hour strike
–
A French important oval single-handed watch with hour strike and the engraved coat of arms of King Sigismund III of Poland (1587-1632) under a crown, circa 1620.
Brass case, gilt, engraved foliate scrolls, pierced sides, silver back cover, glazed dial, rear bell. Gilt dial, engraved with motifs of birds, foliage and a mascaron at 12 o’clock, silver chapter ring with inlaid Roman hours, engraved centre with heron and tendril decoration, single iron hand. Firegilt brass full plate movement, barrel for alam decorated with open-worked ornaments, gut/fusee, verge escapement, locking plate, 1 hammer, ratchet wheel set up with blued steel spring, plain two-arm iron balance without balance spring.
The back cover of the watch is made of silver and engraved allover with the coat of arms of King Sigismund III Vasa.
–
Diameter: 67 mm
–
Weight: 146 g
–
Signed: No name
–
King Sigismund III Vasa (also known as Sigismund III of Poland, born 20 June 1566; died 30 April 1632 N.S.) was King of Poland and Grand Duke of Lithuania, sovereign of the Polish-Lithuanian Commonwealth from 1587 to 1632, and King of Sweden (where he is known simply as Sigismund) from 1592 until he was deposed in 1599.