That Simplex RD is not original. I have a '62 Continental and it came with an early version of the Huret Alvit. As you can see, the chrome on mine is in poor shape. Currently it sits in a spare parts box and I use a different RD and FD on mine.
Bob Hufford's Details on the 1960 Continental read:
First year for the derailleur Continental. 10 speed. Stronglight 47/50 chainset. 15-17-19-22-25 Atom freewheel cluster. Simplex Competition front derailleur and Simplex Tour de France rear derailleur. Weinmann side pull brakes. Tubular painted fork with chromed tips. Forged alloy stem with double clamp bolts. Steel? drop bars. Tire size is listed as 27 x 1� (correct) in the consumer brochure, but as 26" (incorrect) in the model and price sheet. Rims were Rigida steel with knurls on the sides. Hubs were alloy high flange (Normandy?). Yellorex chain. Ideale saddle (#43). Colors were Radiant Red, Radiant Blue, Radiant Green, Radiant Coppertone, and Black.
It looks as if you have made a great find that is nearly original!
