It depends on what you do with your knives. I don't really whittle so I can't comment on that other than saying other actual whittlers I've had had really thin blades too. For my purposes, a #33 works great, especially in an office setting. I use the secondary for opening packages/letters etc with the main blade kept clean for food stuffs if needed (will part a bagel very well, just rotate it). About the only thing that I would use it for that it doesn't work well for would be to cut a messy hero.
I believe all the Northfields have bails. That's actually what it says on the bail too, Northfield. Most of the ones with coping blade secondaries were a CKnet SFO (there were a handful of short runs too, like 3 in ivory, and a bail-less Tidioute in Buffalo Horn). None of the Tidioutes have bails. 440C with bail and pen secondaries is available on 3 SFOs, don't know how many are left though.
Eta, 1 of the sfos is under Great Eastern and in American Elk. It's bail actually says 'Great Eastern', not 'Northfield'. The other ones under the Dog Paws brand, it's hard to tell if their bails are stamped.
Here's a pic I took with a few small knives closed. The #33 with bail is the top one and is one of the CKnet SFOs. This one looks like it has a slightly thinner main blade than my other conductors (I only visually checked my users I had out though)
