Kwazy Quilt (made by Kohner Bros)
Also known as Hi Q Euclid from Peter Pan Playthings manufactured under licence from Gabriel Toys Inc. U.S.A.
Same as Hi Q's Pythagoras , which is made by Tryne Games Mfg.; Lindenhurst, L.I.; 1961 , and also by TOLTOYS 1976.
. . . a packing puzzle made in Hong Kong .
4 Ts . . . from Binary Arts .
There are two sides to this puzzle . The other being slightly smaller in square area .
The T puzzle was used to advertise White Rose Ceylon tea in 1903 .
Boxed In (made by Milton Bradley)
IQ Circle A plastic tangram with its own case .
Double Square from Aha Brainteaser Classics, the Thinkfun people at Binary Arts .
This puzzle is a two-parter . First, this one using 4 pieces (3" square) . The next picture shows the same puzzle using a fifth piece (a miniature square) making the second large square ( 3 1/4" square ) . One source for this puzzle can be viewed at education.puzzles.com
The fifth piece (a small square) has been added .
This item is sold by Bits & Pieces
Very tricky !
. . . pieces
All 5 pieces are identical .