Balmain bug
Balmain Bugs were popular in the early part of the 20th century.
They were once seen on Sydney Harbour sailing amongst the big boats.
They come in lengths ranging from 15 cm (6") to 60 cm (2').

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Balmain bug 2

This is a 30 cm (12") model I made recently (2012).

Balmain bug 3

Balmain bug 4