I copied mine from the ones that Lie-Nielsen uses when filing their saws, It is 3/4" baltic birch and has a leather hinge along the bottom of the clamshell. It is very good for lessening the screech from a dull file. I only have to reclamp the full length saws once per side. The advantage I have is that I have a 24" twin-screw vise to hold the saw vice.

I tried several vintage vises including the Disston D-4, but the saw vice in my twinscrew was much more secure and I can sit while I file, with the teeth about at chest height.

The weakness with vintage vises are the poor design they have for mounting to a bench. Never tried the Grammercy, but on my bench, the mounting would have been awkward.