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Sri Lanka Signals Corps (SLSC). Established on 19 October 1943. Motto: "Certa Cito" Latin - (Swift and Sure). Both the badge and the motto are based on those of the Royal Signals. The Royal Crown abowe the Hermes is replaced by a buddhist wheel.
Sri Lanka Light Infantry (SLLI), this is the oldest infantry regiment in the Sri Lanka Army raised on 1 April 1881 as the Ceylon Light Infantry Volunteers. HRH the Prince of Wales was in the same year made Honourary Colonel of the Regiment, henche the POW plumes in the Badge. Today the plumes are replaced by three sheaves of paddy but still arranged as the POW badge. The regimental Motto is "Ich Dien" Latin - (I serve). This is the motto of the Prince of Wales and the Wikipedia article is wrong it is not Latin but German.
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Sri Lanka Sinha Regiment, a rifle regiment raised 1 October 1956. Motto: "Swift and Bold"
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Gemunu Watch, an infantry unit raised 7 December 1972 and named after one of the most famous Lankan Kings, Dutthagamani. Motto: “Maniwatta Abhikkama”-Pali (Do not tarry, Go forward).