Take a look at the crank on Scooper's Paramount above. As described, you can see the drillings and fluting don't overlap. The shorter flutes are how one can tell the original versus the after-market drilled versions. Still, the original is limited to 36t. As Grand Bois points out, that is fine for many, but it is still a lot of weight to only go that low. Changing the rings does help with the weight.
ymmv.
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1959 Hilton Wrigley Connoisseur (my favorite!)
1963 Hetchins Mountain King
1971 Gitane Tour de France (original owner)
* 1971 Gitane Super Corsa (crashed)
* rebuilt as upright cruiser
1971 Gitane Super Corsa #2 (sweet replacement)
1980 Ritchey Road Touring (The Grail Bike)
1982 Tom Ritchey Everest
(replacing stolen 1981 TR Everest custom)
1982 Tom Ritchey McKinley (touring pickup truck)
1985 ALAN Record (Glued & Screwed. A gift.)