I've got 11093 that I bought new around 76...and mine has no slots in the bottom bracket. Also mine does not have braze on cable guides near the bottom bracket, but a Campy bolt on guide. Its a 54 with steep angles for racing. Who knows how long mine was hanging up at the bike shop in State College Pa. before I fell in love with it. I built mine up all Campy record with tubulars for around $780...
It's candy apple red with white Bob Jackson decals. It was too big for me (5'5"), but I just had to have that color. I barely rode it a year before downsizing to a Richard Sachs that fit me better. 5 minutes ago was the first time I looked at my Bob Jackson in 20 years!