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Measuring just over 6in (16cm) wide, the fan-shaped clock with an easel-back was marked in three places for the workmaster Michael Perchin and housed a double barrel Swiss jewelled lever movement numbered 67466 and signed Hri Moser et Cie.

Kidner's vendor at the sale on July 25 was a descendant of the family member who had bought it sometime before 1964.

The buyer's premium was 17.5%.