2mm deep would be through the tube wall on a 555
It's the lugged 2006 (i think) model. It might not be 2mm but its a noticeable indentation.
Its this one, and the chip is under the first o in look on the down tube.
@mkropitz started
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It's the lugged 2006 (i think) model. It might not be 2mm but its a noticeable indentation.
Its this one, and the chip is under the first o in look on the down tube.