My favorite WWVB watch was the Casio WV-300 series, released around 2007. It's notable for being less than 8mm thick: https://www.google.com/search?q=casio+wv-

My favorite WWVB watch was the Casio WV-300 series, released around 2007. It's notable for being less than 8mm thick: https://www.google.com/search?q=casio+wv-300&tbm=isch https://www.google.com/search?q=casio+wv-300&tbm=isch The GMW-B5000 series is a reasonable successor, but it's thicker, heavier, and 4X the price: https://www.google.com/search?q=casio+gmw-b5000&tbm=isch https://www.google.com/search?q=casio+gmw-b5000&tbm=isch