My best guess is the bottom gun is 33050, his of the pair (33050 and 33051) he and "Marse Henry" got November 6, 1929, for shooting at the Bartholomew's estate on the Potomac. Those guns were covered by Tom Kidd in
The Double Gun Journal, Volume Seven, Issue 2. Since Nash's days of using it, 33050 was restocked with a pistol grip and had a safety added to the original no-safety gun. The original card for 33050 says straight grip, 14 1/4 inch LOP, 1 5/8 inch DAC, 2 inch DAH, 1/4 inch cast off, grip small and half oval, straight pitch with no buttplate or pad, natural wood and checkered. Last I knew, Don Kaas has a gun with the original straight grip trigger guard for 33050.
The bottom gun could also be this one but it doesn't appear to have the 2 inch longer barrels. Because of no cast, I've always thought this was a gun Nash ordered for someone else.
