| 11. | Grasshopper escapements made by Harrison in the 18th century are still operating.
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| 12. | Most escapements wear far more quickly, and waste far more energy.
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| 13. | This is referred to as a coulisse-lever escapement.
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| 14. | The escapement has no contact with the pendulum below the suspension spring.
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| 15. | It has crown wheel and verge escapement in original condition.
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| 16. | This improvement was facilitated by using the cylinder escapement and enhanced springs.
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| 17. | This caliber features the manufacture s Dual Ulysse escapement at its heart.
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| 18. | Escapements were low-powered, but light-weight.
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| 19. | This frees the escapement from the effects of variations in the gear train.
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| 20. | The keys of the keyboard are connected by vertical pushrods to the escapements.
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