just emailed him and this is what he said...
"tony mistakenly sent me a threaded 1" fork (for the angus) instead of the 1 1/8" threadless. he offered to swap it out but i had a NOS dura-ace 1" headset and installed with a headset reducer. the straight fork looked better to me, didn't really change the geometry at all, and i could use a quill stem for that classic look .."