AN EXTREMLY RARE MEN'S 18K YELLOW GOLD AUTOMATIC ASTRONOMIC WRISTWATCH NUMBER 171 OF 200.

Model: Ephemerides Solaires
Date: Circa 1989
Case reference: 5234
Movement: Signed, automatic, 25-Jewels, Cal.L 640.1
Dial: Signed, white enamel ceramic, black Arabic numerals, black leafe hands, blued centre seconds hand, black outer minute division, date aperture at the 12 o'clock position with white calendar disk and black Arabic numerals, month calendar aperture at the 9 o'clock position with a white calendar disk with black Roman numerals, apertures at the 6 and 12 o'clock position to show the times of sunrise and sunset, solar decline and equation of time with an indication of the annual solar ephemerides
Case: Signed, 18k yellow gold, 18k bidirectional bezel with locking mechanism at the 6 o'clock position, 18k gold snap on back, No.2476XXXX
Strap: SIgned, blue leather, gilt buckle
Size: 37mm

Produced in a limited edition of just 200 watches in 1989 to celebrate the 100th anniversary of Longines.