Originally Posted by
repechage
campagnolo made the extra long fasteners and spacers. For a real touring set up they were marginal. Later Campag offered a special arm and spacers to provide for the one size they manufactured - 36t
others have subverted and found smaller rings and or machined their own to mate with a more common BCD for the smallest ring.
In Italy, especially among those of Campagnolo's ilk, cyclotouring was a pursuit practiced by British, French and German girly-men! /s
Italian bikes came in 2 flavors pedestrian/urban single speed or 3-4 sprocket rear derailleur only models, or... full on racing machines ridden by
"uomini d'acciaio" (men of steel).
Witness the original Campy 151 BCD Record cranks with a minimum 44T small chainring. A lot of "racing" bikes from the late 60's through the early 70's came with 52-45T chainrings which were hard to work out smooth ratios that would allow more than 7 distinct gears!
The Campy Record Triple had a 36T small chainring. They could have made a 30T chainring to fit the 100mm BCD pattern but that would have been for wimps. The original triples were most likely produced for tandems! Racing tandems!
It wasn't until the early 1980's when Campagnolo introduced their down market Triomphe, Victory, and Nuovo Gran Sport 116 BCD cranks with a 35T minimum small chainring. The 35T, 36T, 37T, 38T, 39T, 40T and 41T girly-man chainrings were very hard to find because of... availability, maybe???
One reason those cranks didn't sell well is because they were a major departure away from the much copied iconic Campy cranks introduced in 1958. The frumpy 25+ year old design was what Campy buyers looked for.... or why Shimano ate their lunch in the mid-range market!
It wasn't until Campy's ill fated venture into MTB components and the brief era of "racing triples" that they took lower gearing seriously!
Ora che ho lanciato il guanto di sfida !!! 
ADDENDUM: I built a number of 1/2 Step Triples - 50-46-30T. They worked great with 6 speed FWs
With the advent of 7 and 8 speed cassettes the Shimano 48-38-28T MTB triples made more sense. Stay on one front chainring and shift the rear sprockets unless you needed to bail on a hill or had a strong tail wind!
verktyg
/s