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Mechanical-advantage demonstration with pulley block and weight.

1932

Mechanical-advantage demonstration with pulley block and weight.

1932

Mechanical-advantage demonstration with windlass, pulley block and weight

1932
Triple pulley block

Triple pulley block

1752
Hexagonal fitting of black phenolic decorated with Gallia trademark, hook protrudes from one corner, internal puller mechanism, made in England, 1931-1939.

Hexagonal fitting of black phenolic decorated with Gallia trademark

1931-1939