Speck, the, n. — Green’s Dictionary of Slang

Speck, the n.

[SE fly-speck, i.e. on the map; its relatively small (compared to mainland Aus.) size; cits. suggest coined by and used only in Bulletin mag.]

(Aus.) Tasmania.

1910		Bulletin (Sydney) 24 Nov. 11/1: Tasmania’s system can go one better, for [...] not one passenger has been killed. Of course, the Speck’s railways, all told, are only 479 miles.
1916		Bulletin (Sydney) 8 June 24/4: Over the Speck they seldom split really big trees for posts.
1925		Advocate (Burnie, Tas.) 14 Mar. 11/2: ‘Tassy,’ ‘The Speck’. It seems a pity that most of the world tourists pass it by.
1931		Bulletin (Sydney) 8 June 24/4: The curious point in the list of similarities between S.E. Australia and the Speck [etc.].
1943		Bulletin (Sydney) 22 Dec. 13/3: The curious point in the list of similarities between S.-E. Australia and the Speck [etc.].
1955		Bulletin (Sydney) 12 Jan. 12/3: On the north-west corner of the Speck […] the average rainfall is from 50 to 60 inches.