OK, this is admittedly obsessive but I'm home with a cold and too weak to ride.
You know how Record and Superleggero posts had the size stamped in back,
above the "Patent Campagnolo", vs. on the sides for SR? Also the logo on
the front is a globe with script on Record and SL, but just script on
SR. The taller logo in front, and the two lines of text on the back,
would have made the flutes start lower - on all the 2-bolt SRs I've
seen, the flutes go nearly to the top, to where the taller logo wouldn't
fit.
http://bulgier.net/
But I'm wondering if the earliest SR posts had the taller logo, and
flutes that didn't go up as high. My only evidence for this is the
Raleigh catalogs in '74 through '76 showed a post like that:
http://bulgier.net/
Of course many things are different on the SR parts in the '74 catalog, like the chainrings and headset being black anodized. But the '75 and '76 catalogs show an SR gruppo that's pretty much indistinguishable from the parts I've seen in real life, except for that seatpost.
<rant> Raleigh put the post so low in the frame that the flutes are way down inside the lug, a pet peeve of mine. Channeling road grit and rain water into the frame is not a "feature"! Check out the '74, it's so low that only a few millimeters of the flutes poke out above the top of the lug, how embarrassing. </rant>
One more strange thing, one of my 2-bolt SRs, unquestionably a real SR,
has a stamped "Min. Insert" mark. I thought those were only found on
newer posts like one-bolt SRs. I don't mind, it's low enough to be
hidden in use, but I've never seen this before - was this added by an
OEM maybe? I think this post came originally on an Austro-Daimler, and
has nicely done black paint in the flutes.
http://bulgier.net/
Mark Bulgier
Seattle WA USA