The Master Time was introduced around 1958, and produced by Heuer into the 1980s, in a variety of executions. The one that you show is an early execution, probably from around 1958 / 1960. Movement is the Revue Thommen 63 movement; double-barrel; center seconds (thick second hand); hack feature.
Jaccard's was (or perhaps it still is) a local St. Louis jeweler; Heuer made co-branded watches and other timepieces for many jewelers and retailers, and Jaccard's is one of these.
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