A mark that survives the moment
A punched wristband turns an event into a physical trace. Instead of relying on someone to remember when something happened, a person makes a hole at the relevant moment. The mark stays in place, so the band can be checked later—even when no clock, screen, or written log is handy.
The useful trick is that the hole is not just damage: its position can carry information. If different positions stand for different times or checkpoints, a quick glance can show which point in a sequence has been reached. Repeated punches can leave a simple timeline on the band itself. The code has to be understood by whoever reads it; a hole alone does not reveal an exact time.
A record with no moving parts
Unlike an electronic tracker, a punched band does not need power, a signal, or a stored data file. Its record is visible and immediate: the wearer or another person can inspect the marks directly. That makes the method simple, but also limited. It records only what someone deliberately punches, and it cannot automatically say where the wearer was or when a mark was made.
That tradeoff is especially clear in transport, where a sequence of events can matter as much as a clock reading. A band can act as a low-tech checklist of progress, with each punch making a moment harder to lose in memory. The clock is not hidden inside the wristband; it is the agreed meaning of the mark, made tangible enough to carry.
