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For the nerdy geek in your life, this unique wall clock features a high-resolution scan of a vintage antique circular slide rule showing various numeric scales. http://www.zazzle.com/vintage_antique_circular_slide_rule_large_clock-256769486384550663?rf=238083504576446517&tc=20161124_pint_SSoZ #time #math #homedecor #StudioDalio