Vintage CASIO CFX - 400 watch - Scientific calculator - Collectible - price reduced to $550 | WatchUSeek Watch Forums
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My Casio Marlin W-400 will be 40 years old this year. : r/casio
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Casio CT-S400 Premium Pack with 61 Key Keyboard, Stand, AC Adapter, and Headphones Black CAS CTS400 PPK - Best Buy
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Casio G-Shock GA-400-1B Multi-Dimensional Analog Digital Watch
