vcballbat":3tiat8yv said:
Here's some really interesting primary source material from the 87 Raleigh catalogue showing the "Services des Courses" with fastback seat stays.
Sadly that is Raleigh marketing blurb, I wouldn't call it primary source. The text describes a Services des Courses frame but the image isn't. As the text correctly explains, the SDC is full Cinelli with fork crown, BB and lugs - however, the frame in the image has Prugnat lugs, nice frame all the same, probably a model called the Road Champion, but the image certainly doesn't matching the text.