Originally Posted by
repechage
the center slot is a big swallow on a CNC router... I guess a bunch of passes.
the underside of the stem at the headset I find interesting, old memories of Rene Herse stems, I thought they were straight across at the nut, or at least counterbored to fully mate with the headset lock nut.
Way Way back on my first club ride in 1972, a club member had a RH, what an attractive bike! Really looked intensely at the details, including the stem. I had a "pedestrian" by comparison Bertin C-37.
It's possible that the early stems are different from the later ones. My original stem has only the very slightest angle where it meets the headset top nut, and there is no counterbore to speak of. This was discussed in
an earlier post in this thread, where you can see a photo I took of it with a straightedge alongside. I tried to recreate that as best I could on the reproduction!
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Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.