Seiko Crown Diashock Seikosha Calibre 560 Manual Wind 19 Jewel Mens Watch....33mm

Crown was Seiko's early 1960's line designed to compete with Omega and other Swiss makers of dress watches intended to be worn on leather straps. These watches were entirely in-house productions down to the last screw and hour marker and were powered by Seiko's excellent, 19-jewel Calibre 560 movement. Measuring 33mm in diameter, not counting the crown, it wears much larger on the wrist thanks to a narrow bezel in combination with a dial that edges out all the way to the bezel. It takes an 18mm strap and is 44mm long from lug to lug and only 8mm thick. The dial is marked "Seiko Crown" and "Diashock 19 Jewels". Diashock is the Seiko trademark for their shock-resistant mechanism, using a floating balance wheel jewel. Balance wheels are one of the heaviest parts in a mechanical watch, and their rapid motion requires the least resistance, and therefore the thinnest pinions. This means that a big fall can bend the pinions and thus damage the watch. These anti-shock mechanisms work by allo