Definitely a unique fleet, the 747SP is an instantly recognizable variant of the Queen of the Skies. Only 45 were built to fill the need for an ultra long range airliner.
Today many 747SPs still survive and are still in service with at least one airline and also in service with private individuals, governments, "non-profits" and companies.
For much more information on the 747SP, visit www.747sp.com