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Double repetition action of Sebastian Erard as used by S. & P. Erard, Paris

Double repetition action of Sebastian Erard as used by S. & P. Erard, Paris.png Standard modern American grand actionThumbnailsThe Erard grand action modified by HerzStandard modern American grand actionThumbnailsThe Erard grand action modified by HerzStandard modern American grand actionThumbnailsThe Erard grand action modified by HerzStandard modern American grand actionThumbnailsThe Erard grand action modified by HerzStandard modern American grand actionThumbnailsThe Erard grand action modified by Herz

1. Key.
 2. Wippen.
 3. Jack.
 4. Escapement lever.
 5. Hammer-shank.
 6. Roller.
 7. Hammer-head.
 8. Jack regulating button.
 9. Regulating button to limit rise of escapement lever.
10. Hammer-butt.

11. Check.
12. Felt cushion to engage with check.
13. Sticker connecting key and wippen.
14. Action-rails.
15. Damper-head.
16. Damper operating device.
17. Device to limit travel of jack.
18. String.
19. Spring (v-shaped) for escapement lever and jack.