Polerouter S20217/5

Early steel Polerouter with a silver dial, applied shield logo and dauphine handsDauphine handsBroad hands that taper towards their tips, with a central facet running lengthwise. The name describes a hand style, not a particular maker or reference.. The S-prefixed reference uses calibreCaliberThe designation of a watch movement, identifying its design or movement family. 138SS bumper windingAn automatic winding system whose pivoting weight travels through a limited arc, meeting spring buffers at the ends of its swing. Wrist motion moves the weight to wind the mainspring. Unlike a full-rotation rotor, the weight cannot turn continuously through 360 degrees; the travel angle varies by design., rather than the later architecture.