IWC Compass Watch reference 3551 with moon phase, Switzerland around 1985, self winding, blackened aluminum-case, folding, compass in case back, plastic-bracelet with deployant clasp, black dial with crosshairs, moon phase at 12, luminous indexes & -hands, date at 3, gold plated movement calibre 3754, 22 jewels, 5 adjustments, precision adjustment, original box & papers enclosed, diameter approx. 39 mm, length approx. 20 cm, overhaul recommended at buyer's expense, condition 2-3