BrickLink - Set 8421-1 : LEGO Mobile Crane [Technic:Model:Construction] - BrickLink Reference Catalog
Fanwork Digitised LEGO Crane 8421 Turn-table and rigging on Vimeo
LEGO 8421 Technic Mobile Crane NEW & SEALED 673419129312 | eBay
LEGO 8421 TECHNIC MOTORIZED MOBILE CRANE SET BOXED mv | eBay
PHYNEDI CADA Mobile Crane C65005W Compatible with Lego, Technical Series Heavy Engineering Truck Bricks Model, Small Vehicle Building Toy (658 Pieces), 48EPZR16L8511DF, 36.8 x 14.4 14.5cm
LEGO 8421 Mobile Crane Technic Series - 2005 Vintage assembled with book. | eBay
There is a better really big mobile crane than 42009 - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums