Okay, that thought lead me to look at Eisentraut more closely. Look at this album for a 1973 Eisentraut, everything is pretty much there except holes for a head badge. The fork doesn't seem quite right either. but I know that people like Eisentraut and his students (Gordon notably) used Campy dropouts back in the day and all did that style of fastback stays. The flair on the lugs is right in this track bike from the same year and that fork looks close to what you have. So I'm going more in that direction now that I see that lug and yours.

https://www.flickr.com/photos/cortez...57626406158540

by cortezcycles, on Flickr