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- Anthony Randall constant force remontoire
- escapement are some other unusual devices.
- Among these is a ball race of 4mm which
- Mr. Randall champions in certain cases.
- This time piece also contains the use of
- a "Tensator" constant force mainspring
- in which a long piece of pre-stress metal
- ribbon is wound on a pulley and taken up
- by another pulley in an S-shaped manner.
- These springs are claimed by Randall to
- supply a near constant force almost to its
- 8 day, run down point.