Robbert Dijkgraaf on Twitter: "So true. Max time/$$ for decades. Favorite of many physicists I noticed (and apparently terrorists says Wikipedia). Casio F-91W in today's NYTimes. https://t.co/ecUkAoC4H8" / Twitter
Castel di Casio - Wikipedia
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File:CASIO ATC-1100 (2058507659).jpg - Wikipedia
File:Casio Sport outgear SGW-400HD-1BV.jpg - Wikipedia