The class D-3 consisted of eight light Decapods built in 1930 for the Seaboard Air Line. They were ordered after the SAL had leased the Georgia, Florida & Alabama in 1927 and found out about the versatility of their six light Decapods. Actually, the new ones were virtually identical and could deliver high tractive efforts on branch lines with an axle load of only 19 tons. They were numbered 529 to 536 and retired in 1952 and 1953. After that, the Gainesville Midland bought a total of seven of both the original and the new class. No. 209, the original SAL 533, was preserved and is on display at Gainesville.