Rare Casio TM 100 Radio Transmitter digital watch JDM Japan module 661 | WatchCharts
Ruth Ann Crystal, MD on X: "Casio TM-100 from Nerd Watch https://t.co/uHEA2nTfrM. It can transmit sound. (One way walkie talkie-esq?) @mhattikudur @mwichary @ruffian https://t.co/YdKkpzvtPX" / X