Swedish/German Polo chess clock. According to the seller, the clock is of Swedish origin, ca. 1960's. The clockworks are labeled "Made in Germany", however. I do not know anything about a "Polo" brand and have never seen a clock like this, so I guess it must be rare. It comes with a shuttle slider mechanism, which works very well even though it is a bit stiff. The backside seems to have been replaced by a tailormade metal cover. All in all a very special and fine working clock in almost pristine condition.