LEGO 712 Sea Plane is a vintage LEGOLAND set from 1977 valued at $518 for new and sealed sets, up 17235% from an original retail price of $2.99. Annual appreciation has averaged 8.86% since release. Used copies are valued between $40 and $100 depending on condition.
LEGO 712-1 Sea Plane is a LEGOLAND Town set released in 1977 in the United States, containing 115 pieces and 2 minifigures. The set builds a floatplane with twin pontoons and a small dockside setting for harbor or water transport scenes. It is the U.S.-numbered version of set 371 Seaplane, which was released in Europe, the United Kingdom, Australia, and Canada with the same design and contents. The set belongs to the vintage LEGOLAND Town range from the late 1970s, when regional numbering variants were commonly used for different markets.
A new and sealed Sea Plane is currently valued at around $518, with annual growth of approximately 6%. The average used price is $60 for those in good overall condition. Based on current trends, this set could be valued near $561 within the next year. New and sealed listings currently range from $500 to $1,000.