The prototypes for the Rapido Trains HO Scale Class H-1a and H-1b 4-6-4 Hudson locos with sound and DCC were state-of-the-art steam power when delivered in 1929 and 1930. A total of twenty locos were delivered in two batches of ten each. The first batch, numbers #2800-2809, were delivered in 1929 and classified H1a. The second ten, numbers #2810-2819, were delivered in 1930 and were classified H1b. These locomotives were used on mainline passenger trains across the CP′s system. These locomotives were so successful that CP used their design as the basis for its later H c/d/e Royal Hudsons seven years later. Both classes survived intact until the end of steam, with the first retirements not coming until 1957. These HO Scale replicas feature roadnumber-specific factory-applied details separately applied metal hand rails and grabs, blackened wheels and driving rods, correct cylinders and valve gear a smooth-running drive train, correct coal tenders for regular service units and a correct oil tender for #2816. The Class H-1a and H-1b 4-6-4 Hudsons come equipped with a sound and DCC decoder and have a recommended curve radius of 22′ or larger. CP Class H-1a and H-1b 4-6-4 Hudsons are part of the extensive line of Rapido Trains HO Scale locomotives.