I remember that bike. Yeah, Styr Daimler Puch is the manufacturer. If it is complete, it goes for quite a bit on Ebay. Time frame is from maybe 1961 or 2 to about 1964. Not sure what Sears did after that.

Some of the bikes came with Campy components--the funny little front derailleur built in an alloy box, the Campy whatsit model name bronze rear deraillleur with adjustable bearing pulleys, etc. Might have Weinman 999 brakes? I own one, but with a fresh paint in a different color--Emerald Green and Old English Cream, the frame is on display at CyclArt. Rides beautifully and handles really well. Heavy sucker, though.

The metal is really funny stuff, it has a spring to it. When cold setting, it eventually works its way right back to where it was before you paid all the money to get it changed.