Quote:
are you going by weight to tell the difference?
For the most part, yes. When you start weighing small cents you get a general idea of what the common weights are for that specific date.
For 1980 they all weighed in around 2.78 to 2.81g (normal) and when this one hit the scale it was 3.1g dead on.
Quote:
Are the diameters identical on these two coins?
Yes, Barbados 1c planchets and Canadian 1c planchets both have a 19mm diameter.
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