Lenz 42450-02 DB 10T Whylen Crane with flat wagon (Type X05 Mainz 6602) DCC Digital Epoch III.   O Gauge 

40 of these crane wagons were built by Eisenbau Wyhlen AG. Originally they were manually operated, but they were later converted to compressed air or Diesel/electric operation.

The Lenz model will feature DCC Digital control.
  Rotation of the crane
  Boom lift and lower
  Hook lifting and lowering
  Moving counterweight
Support jacks will be moved by hand