TDD Earth Tech

When a trench is being dug, it’s important to get it dug to the exact right depth to save on costs and work. Too shallow, and the trench might need to be re-dug, while a trench that’s too deep (known as "over-dig") is wasteful and expensive.

The toy Road Building Set by Metalcraft was in great demand in the 1930s, and it’s a rare collectible today. With movable wheels and articulated components, the set included a bright red and green dump truck, excavator steam shovel, and machinery hauling truck.