Good morning: I am restoring my late father's Schwinn Continental Maroon Serial # K7177. The bike is complete except for replaced handlebar grips. Is it possible that the bike was built prior to WWII? My reason for asking is that in addition to the Sturmey Archer 3 speed hub, there is also a derailluer fitted. Would the derailluer hve been a Schwinn factory option? The bike still has most of the decals intact including one marked Sam's Bicycle Shop which was a long standing Rochester NY Schwinn/Raleigh bike shop. The frame has the welded on kickstand mount with tapered unpainted stand. Dad had dismounted the handlebars and flipped it for a lower stance riding profile. The family legend is that Dad rode the bike during WWII 2 miles each way back and forth to Kodak Park in good weather due to gas and car tire rationing. My understanding is that Kodak promoted bike riding by providing inside the gates secured bike racks. Question: is it possible somehow to see if the bike was really built and sold pre-war or was the frame stored until just after the war with the bike being built prior to the Schwinn fire?