Lot Essay
The Constellation Electroquartz model was launched at the April 1970 Basel Fair, featuring the Beta-21 movement developed by a consortium of Swiss watch companies. For a detailed note see lot 69 in this sale.
The model is illustrated in Armbanduhren - 100 Jahre Entwicklungsgeschichte by Kahlert, Mühe, Brunner, fifth edition, p. 475, pl. 1681.
The model is illustrated in Armbanduhren - 100 Jahre Entwicklungsgeschichte by Kahlert, Mühe, Brunner, fifth edition, p. 475, pl. 1681.