21 Propellers, Wheels and Rotors

21 Propellers, Wheels and Rotors was a Service Pack set released in 1977. It contains fifteen pieces.
== Notes ==
* Also numbered S.21 or Sp.21 in some European countries
* This set is the same as sets:
** 1121 Propellors, Wheels, and Rotor Unit
** 5031 Propellers, Wheels, Rotor Unit
** 4 Propellers & Wheels
== Gallery ==
Propellers, Wheels, Rotor Unit 2.jpg
== External links ==
* 21 Propellers, Wheels and Rotors at Bricklink.com
Category:Service Packs
Category:1977 sets
Category:0000 sets