Olivetti Lettera 22 Margin Stop Control Bar — Vintage Typewriter Spare Part

About:

This is the original internal margin stop control bar, the component that links the margin release key to the margin stop system located behind the carriage. It ensures proper engagement and release of the left and right margin stops when the margin release key is pressed.

Function:
When the user presses the margin release key, this bar transmits the movement to the rear margin mechanism, allowing the carriage to pass a set margin safely. If the typewriter refuses to release at the margin, releases only on one side, or the key moves freely with no effect, this is the part commonly responsible.

Compatibility:
Suitable for Olivetti typewriters model Lettera 22 that use this specific style of rear-mounted margin-linkage bar. Compare shape, hooks and mounts with your existing part before purchasing.

Condition:
Original vintage component removed from a donor machine. Cleaned, inspected, and fully functional. May show natural signs of age consistent with vintage mechanical parts.

Why This Part Matters:
A bent, worn, or missing margin control bar leads to stuck margins, irregular carriage stopping, or an ineffective margin-release key. Replacing this bar restores smooth carriage movement and correct margin operation.

If You Need a Different Part

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Typewriter Spare Parts for Restoration and Repair (General List)

1. Keys and keytops
2. Key levers
3. Key lever cords
4. Typebars
5. Type slugs
6. Typebasket assembly
7. Segment and segment screws
8. Universal bar
9. Linkage rods, link arms, and connecting wires
10. Ribbon spool drive gear
11. Ribbon drive shafts and clutches
12. Ribbon vibrator assembly
13. Ribbon guides
14. Ribbon covers and mask plates
15. Ribbon spools (metal or plastic)
16. Feed rollers
17. Paper-release lever
18. Paper bail rollers
19. Paper guides
20. Card or paper support
21. Platen (rubber roller)
22. Platen core
23. Platen knobs
24. Line-spacing ratchet
25. Line-feed mechanism
26. Margin stops
27. Tabulator system (tabulator, tab stops, tab lever)
28. Tabulator spring
29. Escapement wheel
30. Escapement pawl or escapement dog
31. Escapement rack
32. Carriage rails
33. Carriage rail bearings
34. Carriage rail trace bearings (two-ball type)
35. Carriage escapement assembly
36. Carriage return lever
37. Carriage knobs
38. Carriage end plates
39. Drawband
40. Main spring (power spring)
41. Escape spring
42. Return spring
43. Shift spring
44. Tension springs (ribbon, carriage, typing action)
45. Shift mechanism (shift arms, shift guides, fulcrums)
46. Basket-shift or carriage-shift assembly
47. Spacebar
48. Spacebar assembly (linkage and return)
49. Stabilizer bar
50. Backspace mechanism
51. Backspace lever
52. Body panels and top covers
53. Bottom plate or chassis
54. Side covers and trim pieces
55. Feet and anti-vibration pads
56. Screws, washers, collars, and small fittings
57. Universal joints
58. Internal levers and metal arms
59. Precision springs and micro-springs
60. Line selector lever
61. Paper scale or page-end indicator
62. Paper injector (where applicable)
63. Bell mechanism
64. Bell gong
65. Bell hammer
66. Carriage brake or tabulator brake
67. Carriage lock
68. Margin release assembly
69. Ribbon reverse mechanism
70. Ribbon reversing fork or actuator
71. Intermediate gears (plastic or metal)
72. Internal transmission gears
73. Typebar rest felt or rubber strip
74. Sound-dampening felts
75. Spool retainers and posts

Note:
This component requires professional installation. Proper alignment of the margin mechanism and carriage assembly is essential. It should be installed by a trained technician or someone with advanced mechanical skills.