Hi, everyone. A wanderer from the BOB list here, just looking for the optimal classic.
I have front & rear SLJ 6600 derailleurs. The rear is long-cage, and the front has the wide, dropped inner plate that implies "crossover."
This setup is intended for my new Rivendell road frame, but if someone has a NOS half-step version of the Simplex front, I might consider buying it or trading it for my crossover version. According to an old Frank Berto article (with photos), at least, Simplex did make a half-step version. The front, by the way, will be a triple, resulting in either a half-step or crossover plus granny.
Just thought "it's always worth asking."
Best regards,
Joe Kubera