'Old Mary'  Heavy Steam Crawler Crane
 
Old Mary" referred to Mary I, Queen of England
 
Steam cranes were often improvised machines, especially in the late 19th and early 20th centuries, when contractors and railway workshops commonly built them by combining spare locomotive boilers, second-hand steam engines, old winches, and parts from damaged cranes. These hybrid, “cobbled-together” cranes were especially common on construction sites, small railways, docks, and canal works, where budgets were tight and purpose-built cranes from major manufacturers were too expensive. During wartime or urgent engineering work, the practice became even more widespread, with workshops assembling serviceable cranes from whatever equipment was available. Although rough and unstandardized, these improvised steam cranes were reliable enough to handle heavy lifting and remained in use for decades.
 
A double hook on a crane is a hook assembly with two hooks, often called a "double crane hook," "ramshorn hook," or "sister hooks". These are used for lifting unbalanced or very heavy loads, improving stability by distributing the weight evenly. 
 
This listing is for our UNPAINTED model, crafted in premium black ABS Strength 405nm resin.
Black resin offers a distinct advantage for painting — it removes the need to paint undercarriages, hulls, boilers, wheels, cab interiors, and other hard-to-reach areas.
We never use standard grey resins, which are brittle and prone to breakage. Our high-quality high strength, black resin ensures exceptional durability and detail.
Painting coverage on black resin is identical to grey or white, easily achieved with just 1–2 coats of acrylic model paint. Perfect for the DIY model enthusiast!
 
 
(We also offer Painted variations of all our models in our other listings!)
 
✅ Premium 405NM ABS Strength 3D-Printed Construction
Built for durability and precision detail — every model is crafted using high-quality ABS strength resin for long-lasting durability.
✅ Ready to Use – No Assembly Required
Each piece comes fully pre-assembled, so there’s no gluing or tools needed. Just unbox and enjoy.
✅ Display-Ready Packaging
Every model arrives in attractive retail packaging, perfect for collectors or display shelves.
Available in painted and unpainted finishes.
✅ Perfect Gift Idea
Ideal for hobbyists, collectors, and model enthusiasts — ready to gift straight out of the box!