The 1949 Claude Butler in my shop to be repainted does not have the characteristics you described. It is definitely low trail. It has 2 3/4" fork rake (the Brits weren't using the metric system right after the war) with a 74º Head angle. Yes 74º. I am sure because I put it in my framebuilding fixture to find out what angle it was. My fork alignment tool allows for accurate rake measurement too. Its lugs are bilam but the fork crown is a standard Wagner (i think) no bilaminate construction involved with the fork crown.