I honestly have a vague idea of what I am dealing with here. The cable stop/guide for the rear brake cable is not a hollow tube cable housing stop. It's a notched nub brazed onto the seat clamp mechanism and is all one piece design. Also, if you look closely, and draw a horizontal line with your eye along the axis of the seat clamp bolt, imagine this... the little nub is slightly canted vertically toward the the horizontal or vertical center line of the frame, if you will. For the rear brake, there is a cable stop brazed near the steerer tube, then there is nothing along the top tube for cable management until this nub brazed onto the seat post clamp. I've never seen a design like this, so I am a bit puzzled.
Other than the rear drop outs stamped with "Ritchey" I don't know what else I can measure. Maybe the bike was resprayed at one point, as indicated by the water bottle holder bolts, one set is yellow the other red. Where the paint colors meet, there are no ridges. Where there are chips, I see very light grey primer then metal.
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