It appears you are indeed correct:Either here or Accurate Shooter.
I'm glad to know someone out there is still working on them.Robert is putting the finishing touches on my No.1V. in 220 Swift. Kreiger 26" 1:12 4 groove with a contour matching the original barrel. Barrel is chambered and extractor grove cut. Forearm bedded and modified to minimize contact with the barrel. Re-blued and 30mm Talley rings being installed by D'Arcy Echols. Look forward to getting it back.