Like the LEGO City theme, LEGO City keychains are based on city life with the sets depicting city and emergency services, police, fire, airport, train, construction, and civilian services. Each keychain minifigure is based on City characters and such includes police officers, fireman, doctors and other City life minifigures in keychain form.
Summary
Gear Key Chains / City Doctor Key Chain set 4493756 was released on October 24, 2007, retailing for $3, it has since been retired. New, unopened sets are valued at $19, used ones can be found for $16.
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