This coin has got to be one of the world's cutest coins with the usual Harp of Ireland on the obverse and a Hare on the reverse.
 A hare on the dinner table was a welcome sight to peasant and gentry alike.

Threepence / Leath Reul
Ireland
Value 3 pence
Mass 3.23 g
Diameter 17.7 mm
Thickness 1.9 mm
Edge Plain
Composition Nickel (1928–1942)
Cupronickel (1942–1969)
Years of minting 1928–1969
Catalog number —
Obverse
Design Irish harp
Design date 1928
Reverse
Design Hare
Designer Percy Metcalfe
Design date 1928
The threepence (3d) (Irish: leath reul) coin was a subdivision of the pre-decimal Irish pound, worth 1⁄80 of a pound or 1⁄4 of a shilling. The Irish name (leath reul) literally meant "half reul", the reul being a sixpence coin worth the same as the Spanish real (a quarter of a peseta). As with all other Irish coins, it resembled its British counterpart, as the Irish pound was pegged to the British pound until 1979.

Originally it was struck in nickel and was very hard-wearing. In 1942, as nickel became more valuable, the metal was changed to cupronickel of 75% copper and 25% nickel. The coin measured 0.695 inches (17.7 mm) in diameter and weighed 3.23995 grams; this did not change with cupro-nickel coin. The coin was minted at the Royal Mint starting from 1928, and ceased to be legal tender after decimalisation on 31 December 1971. Ireland did not adopt the brass, dodecagonal three pence coin that Britain used between 1937 and 1971.

The reverse design featuring a hare was by the English artist Percy Metcalfe. The obverse featured the Irish harp. From 1928 to 1937 the date was split either side of the harp with the name Saorstát Éireann circling around. From 1938 to 1969 the inscription changed to Éire on the left of the harp and the date on the right.[1]