Shell is a subtheme of Town that was introduced in 1999 and currently consists of 5 sets.
LEGO Town was one of the LEGO Group's core themes which was based on town life and included sets such as emergency services like police and fire and civilian sets such as cars. LEGO Town incorporates many subthemes, which focus on a specific area of Town such as airport, artic, city, divers, flight, rescue, space and various others.
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