Like many US railroads in the 19th century, the Denver & Rio Grande's standard freight whistle was a single chime 'hooter.' Around the 1900's and later with the introduction of the modern chime whistles, many earlier loco classes such as the K-27 on the D&RG and its successor the D&RGW, kept their hooters, yet some eventually got the new shop-made Nathan 5 chime derivative whistle (D&RGW 5 chime) or 3 chimes such as the short-bell whistles crafted by Hancock Insipirator Co. of Manning, Maxwell and Moore of New York. One of the many original D&RGW freight hooter whistles fell into the hands of a private collector, which was used by the now-defunct Tavares, Eustis and Gulf Railroad in Florida on their turn-of-the century wood-burning Mogul, a Baldwin loco, number 2. This was recorded while the TE&G's Orange Blossom Cannonball was still in operation in 2013.