Who knows how to reset this timer
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Mechanical timer, how to reset it
What is this thing? It seems to be mechanical; you need to take it apart and put it back together again
This is a mechanical timer or mechanical accumulator; if it can be reset, there will be a reset button on its front or side. Judging from the surface of this device, it’s not possible to reset it. If a reset is needed, write down the current display value on paper nearby; then you can calculate the difference later.