Yellow gold Patek Philippe Ellipse Beta 21 wristwatch. Cushion case in yellow gold, screwed caseback, canned crown. Blue dial, quartz movement. Applied baton hour marker in yellow gold, luminescent luminescent yellow gold, baton hands. Second hand central, calendar by date aperture at 3 o'clock. Yellow gold bracelet, clasp in yellow gold signed Patek Philippe. Dial‚ case and movement signed. Very good condition: dial, glass and hands in very good condition, superficial scratches on the bracelet, patina on the clasp, slight scratches of use on the case. This reference, produced in very limited numbers, is one of the first quartz models marketed by Patek Philippe.