These type of clocks or to provide of paper (dials) and one or more needles. When there is an action to registrate the arrived pigeon the needle makes a puncture in the paper which is the clocking time.
Punctured paper dials
These type of clocks or to provide of paper (dials) and one or more needles. When there is an action to registrate the arrived pigeon the needle makes a puncture in the paper which is the clocking time.
Punctured paper dials