Here's another old centurion (70's it appears, due to SN) - I'll get pics up shortly. I bought it as a converted fixie, but it appears that the stem, front brake, and possibly crank and seatpost could be original.
SN WSM78C1745
"Hi-Tensile Steel" sticker on bottom of ST
Round, riveted headbadge - a large C with the words "centurion bicycle works" around the edge
Dia-compe front brake, with "D186B" stamped in the arm
Semi-horizontal drops, with no derailleur hanger.
SR stem
Sugino cranks -
Any idea what year this guy is?
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Proud owner of a bicycle with an 8mph top speed.