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In the movie Encino Man, actor Sean Astin wears a black Casio CA-53W-1Z watch. Here, he plays Dave Morgan in this 1992 comedy film. This is a calculator watch that even has calculator buttons and a digital LCD dial. As you can imagine with Casio watches, it’s also priced very competitively.
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This uses a quartz battery and also has an impressive 10 year battery life.