try for measurements http://www.boxallandedmiston.co.uk/s...htly-different http://blackpowderfa.proboards.com/t...-caliber-chart
William Rowntree was on The Bank,Barnard Castle,Co. Durham, around 1847 to 1865.
There was a branch of the family in Durham. They seemed to turn out quite a lot of transitional revolvers (percussion). Mel
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