I have an older Billykirk briefcase (believe it's the 237) and it's been a great bag. Aged nicely and built like a tank with quality feeling thick leather. Just wish I had gone with another colorway then I did.
The newer Billykirk bags I have handled are OK, but you can tell they are not using as nice of leathers anymore. I suspect they are cutting costs. If you are interested in one, i'd try and check it out first. Just to see if it's to your liking.
Yeah, cutting costs and raising prices. I'm pretty sure those 237's used to be in the $350 range...Glad you've got one that's been good to you.