Got this and know what it is, but not quite how it measures. One side of the scale is marked GRAMM. Have checked with BP and it´s fairly accurate. It goes up to 4 grammes but the scale on the opposite side reads 10 (2 reads 5). So it can´t be grains. It could well be Germanand was obviously made for BP in that era. Can anyone help with the non-gramme scale?
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