I've had similar luck. It's possible that Griffin & Howe don't have all the VL&D guns in their records, but they certainly have a lot of them. And as Recoil Rob pointed out, sometimes a search will turn up all kinds of interesting guns on which they have records. I had a 1930's Sauer 20ga. The research on that one included passenger manifests showing that the owner of the gun in question made a couple trans-Atlantic trips, etc. That's in addition to all the details on the gun.