i think the second threaded hole had a small allen bolt in it to spread the stem so you could get the bars in that bit easier. hard to tell without a picture.or i might just be plain wrong
That would make more sense, a bolt that thin wouldn't add much clamping force...bars are 26 mm so assume the 3TTT are standard 26 also... so how to get it tight ? sandpaper or shim?
Colnago Super, C record Delta 7v,
Olagnero Signature Model, DA 7401
Battaglin EL101 tubing 8v
Wilier Campagnolo 8v Record
Daccordi Furioso, Campag Veloce 9v