Puncheon (unit)
Puncheon was a British unit for beer, wines and spirits. It was also an American unit of capacity for wine.
Also refer English wine cask units
70-120 gallons
84 gallons
1 puncheon = 70-120 gallons
1 puncheon = 0.318-0.546 m3
1 puncheon = 4/3 Hogshead
1 puncheon = 84 gallons
1 puncheon = 0.317974589856 m3
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Wikipedia