The attached information sheets says this is the "former 21-foot class Imp, which began life in 1886 as the Claretta".
"The Claretta was launched at Hobart in November 1886, having been built at Battery Point by James Davey for Alfred J. Mitchell of the Derwent Sailing Boat Club, her dimensions being 21ft. waterline (hull overall) x 8ft.6in. x 3ft.3in. She was constructed of Huon pine planking up to the waterline and kauri pine above."
Historic sailing vessel Imp
Launched in Hobart 1886--the last of the 21' L.O.A Class.