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Thirteen puzzles

Thirteen puzzles

1920-1970
First models of the 'impossible triangle' and 'impossible staircase'

First models of the 'impossible triangle' and 'impossible staircase'

1955-1959
Wooden puzzle

Wooden puzzle

1920-1970
Representation of Republican opinion in the USA

Representation of Republican opinion in the USA

1920-1970
Loose pieces of models demonstrating self-reproducing mechanisms

Loose pieces of models demonstrating self-reproducing mechanisms

1920-1970
Drawing of models demonstrating self-reproducing mechanisms

Drawing of models demonstrating self-reproducing mechanisms

1920-1970
Finger print models

Finger print models

1920-1970
Collection of models demonstrating self-reproducing mechanisms in chemistry and biochemistry

Collection of models demonstrating self-reproducing mechanisms in chemistry and biochemistry

1920-1970
3D Histogram

3D Histogram

1920-1970
One of twenty wooden interlocking models with eight pieces

One of twenty wooden interlocking models with eight pieces

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models put together to make a partial cube

One of twenty wooden interlocking models put together to make a partial cube

1920-1970
Wooden rectangular puzzle

Wooden rectangular puzzle

1945-1955
3D puzzle

3D puzzle

1945-1955
3D puzzle

3D puzzle

1945-1955
3D puzzle

3D puzzle

1945-1955
Irregularly shaped puzzle

Irregularly shaped puzzle

1945-1955
Six wooden interlocking models

Six wooden interlocking models

1920-1970
One of twenty wooden interlocking models made with rectangle shapes

One of twenty wooden interlocking models made with rectangle shapes

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
Wooden interlocking model

Wooden interlocking model

1920-1970
One of three interlocking objects

One of three interlocking objects

1945-1955
One of three interlocking objects

One of three interlocking objects

1945-1955
One metal interlocking model

One metal interlocking model

1920-1970
First model of the impossible staircase

First model of the impossible staircase

1955-1959
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
Three wooden interlocking models

Three wooden interlocking models

1920-1970
Six wooden interlocking models that connect to one another

Six wooden interlocking models that connect to one another

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
Sliding block puzzle

Sliding block puzzle

1945-1955
Three piece square block puzzle

Three piece square block puzzle

1945-1955
Wooden rectangular puzzle

Wooden rectangular puzzle

1945-1955
Painted wooden cube puzzle

Painted wooden cube puzzle

1945-1955
Hexagonal puzzle

Hexagonal puzzle

1945-1955
Triangular puzzle

Triangular puzzle

1945-1955
Metal triangle puzzle

Metal triangle puzzle

1945-1955
Metal triangle puzzle

Metal triangle puzzle

1945-1955
Six flat wooden interlocking models that slot together

Six flat wooden interlocking models that slot together

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
One of twenty wooden interlocking models

One of twenty wooden interlocking models

1920-1970
Six wooden interlocking models that connect to one another

Six wooden interlocking models that connect to one another

1920-1970
One of three interlocking objects

One of three interlocking objects

1945-1955
First model of the 'Impossible triangle'

First model of the 'Impossible triangle'

1955-1959
Karyotype made by Lionel Penrose, Ca. 1963

Karyotype made by Lionel Penrose, Ca. 1963

circa 1963
Twenty wooden and one metal interlocking models with a tray for manipulating them, made by Lionel Sharples Penrose, 1955-1965

interlocking models with a tray for manipulating them

1920-1970