the casio gwm5610 is a #bitcoiners watch:

- performs time synchronization with the closest global atomic clock signal every night; if the sync fails, it tries again every few minutes (proof-of-work)

the correct time is verified to the second

- atomic time keeping is more or less decentralized, given that there are 6 signals broadcasted globally (casio calls it multiband 6)

- while achieving time-verification, it is completely air-gapped; no wifi compatibility, no bluetooth, not even NFC

this thing’s more air-gapped than a #coldcard

- takes unused solar polar and converts it to power via its solar cells

- like bitcoin, it does basically one thing, and one thing only;

tells the time.

after all, isn’t #bitcoin just one giant decentralized #clock?

⏱🤔