New answers tagged maintenance
Mystery solved! At Catija's prompting, I managed to dig up the cutter on the website of the shop I bought it from, the Chef's Hat in Melbourne, Australia: CUTTER PIZZA W/ALUM HANDLE 95MM S/ST ($6.60) So turns out the handle is aluminum (aluminium), which can be discolored black if the alloy is not dishwasher-safe, which this clearly wasn't. Time to ask ...
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