Charles, CRs:
The beautiful stainless steel lugs on the black Davidson bike are Richard Sachs' "Rene Singer" lugs, matched to a stainless steel "Ritchieissimo" fork crown.
You can find them listed on the page below.
http://www.richardsachs.com/
FYI, the cast-in cable stops on the bottom head lug have been removed.
I hope that my next frame will have these lugs; I like them!
Andrew Gillis
waiting for rain in Long Beach, CA USA