Hi Charlie, I have an ad from Gary Herman's Safari Outfitters from July of 1974 that lists a 4 Bore W W Greener double rifle with 22" barrels. It was made for the Maharaj Rana of Dholpur and was cased in its original case with all accessories. It was a top lever hammerless. I saw pictures of the gun and a friend of mine held it. He said it was a ball gun. It was listed at $12,500.00. Just below it is a matching 16 Bore double rifle (also a smooth bore ball gun) made for the same Maharaj Rana. It was listed for $2,850.00. I will try to find the picture of the 4 Bore.