Cartier must de 21 travel alarm desk clock with pouch

A rare and fine Cartier Must de 21 gold plated & enamel travel alarm clock.
 
Gold plated body, enamel detailing, embossed bezel, 50mm diameter in good condition. Small scuff around 6 o'clock.
 
White enamel dial, printed black Roman numeral indexes, in very good condition. 
Printed "Cartier" below 12 o'clock.
 
Original blued steel sword hands.
 
Cabochon Sapphire set setting crown.
 
Original glass.
 
Cartier quartz mechanism in good working condition.
 
Original Cartier red dust pouch.