The Marion Power Shovel Company was an American company that manufactured large steam shovels, excavators, and other heavy machinery for construction and mining.
The company's shovels were used in major projects such as the construction of the Panama Canal, Hoover Dam, and the Holland Tunnel.
The toy in the image, specifically a "Marion" model from around 1930, represents the power shovels produced by the Marion Steam Shovel Company.
The development of cheaper, simpler diesel and electric shovels led to the decline of steam shovels in the 1930s.