Depth...

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and diameter...

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...look OK. So using this filler:

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...and a toothpick we get this:

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Leave for a couple of hours to let the filler dry, then clip off the excess toothpick and sand a little:

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Toothpick looks a little dark, filler a little light (which is a pity, because it was a good match then wet). Will see how it looks with some finish on it; there's still the option of trying a darker filler if required.