It sure seems from the higher grade (4E and above) 12-gauge NIDs I've seen over the years that the bulk of them were ordered out as double Trap guns, likely to go with a shooters Knick single?!?
All three 12-gauge NID Sousa's I've handled have been fully optioned target guns, two 32-inch Trap Guns, and the other a Skeet gun. The Skeet Gun was at Randy Shuman's years ago, and I imagine the same gun was some years later on Jack P's web site. One of the Sousa NID double Traps was at Jacqua's. Being far away from my notes I don't recall where the other was when I saw it.
I'm sure you've looked at more then I have, Walter. My gut feeling is that I've seen more vent ribbed NIDs then I've seen vent ribbed L.C. Smith, Parker Bros. and Ansley H. Fox doubles combined.
