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sparnmaltunna [Swedish]

In Sweden, ? – 19ᵗʰ century, a unit of capacity used in the grain trade, about 164.66 liters.

The sparnmaltunna was derived from the maltunna, which is exactly 5600 cubic tum (the tum as a tenth of the fot, not a twelfth of the fot as it was earlier). When the use of heaped measure in the sale of grain was forbidden, to compensate buyers it was decided to allow an additional fjerding for each maltunna purchased. The fjerding, an eighth of a maltunna, is 700 cubic tum, making the sparnmaltunna exactly 6300 cubic tum.

Adams 1821, page 236, letter from Jonathan Russell.