The rear drop outs look pretty standard, i have seen many campag drop out and the shimano ones look similar.
If the forks are spinner the would be welded at the crown not brazed. any signs of brass in there? If so they may not be build by the builder and it could be back to a Bromwick with replacement forks at the orginals did not have much mud clearnace. or a sherwood and that comes int he road versions with standard welding forks colour matched. Just a thought, not that it is definiative in any way.