Green’s Dictionary of Slang

Dutch pegs n.

legs.

1901		Eve. Star (Wash., DC) 14 Dec. 23/2: Australian English [...] Legs are ‘dutches’ (an abbreviation of ‘Dutch pegs’).
1905		Duke Tritton’s Letter n.p.: And I can come home now after a hard day’s yakka, change into clean duds [and] shove my Dutch Pegs under the Cain And Abel.
1918		Aussie (France) VIII Oct. 1/2: The Digger got an eyeful of this bird and noticed that he had a wooden leg. ‘Off with your old Dutch peg on the toot sweet,’ he ordered, ‘and the tooter the sweeter!’ In less than half a minute the stump was off and being carried away.
1922		Healesville & Yarra Glen Guardian (Vic.) 4/4: I hoist myself up on to me dutch pegs and offers my arm to the frills.
1935		Mirror (Perth) 14 Sept. 17/2: Legs: Dutch pegs.
1960		J. Franklyn Dict. of Rhy. Sl.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 25: Dutch Pegs Legs.
2002		Pete’s Aussie Sl. Home Page 🌐 Dutch peg(s): leg(s).