Pictures indicate two road bike frames (and an old mountain bike frame tossed in for good measure) each approximately the same size and head tube angle. One frame has an original fork, the other none at all. I have a spare fork that would fit the forkless frame, BUT... does it appear to have too much rake to it? I see the mismatched fork would put the axle out further by a significant amount as compared to the stock fork on the other frame. The Concorde designers saw fit to have a certain rake for that frame. I would have swapped forks out if it fit the Sekine (blue one) but not enough thread protruded.