Twelve Points To Insanity
Purchased from Mr. Puzzle Australia 2006, level 1, no holes.
(six wood pieces, 3.5 inches)
Mr. Puzzle Australia credits this puzzle as being sold as early as 1875,
and as having been sold under a number of names, including
the Gem Cut Puzzle,
the Chestnut Burr,
and the Snowflake.
When assembled it looks like a standard version of the
Simple Six Piece Burr
(where pieces have a diamond cross section).
However, it actually is composed of six identical pieces where two assemblies of three slide together.