Hispano Olivetti Studio 46 Studio 42 Platen Knobs, Black About: These are original black platen knobs for vintage Olivetti typewriters. Platen left and right knobs allow you to advance, align and adjust the paper manually with precision. This matched pair includes both left and right knobs, complete with their original internal mounts and locking cores. Fully functional, cleaned and ready for installation. Important:The price includes the pair of platen knobs only, not the typewriter. Typewriter Spare Parts for Restoration and Repair: Keys, 2. Typebars, 3. Spools, 4. Platen and Rollers, 5. Platen Knobs, 6. Chassis, 7. Screws, 8. Rubber Feet, 9. Internal Mechanism Parts, 10. Carriage Return Mechanism, 11. Escapement, 12. Feed Roller, 13. Hammers, 14. Linkage System, 15. Ribbon Spool Pins, 16. Carriage Lock, 17. Margin Release Lever, 18. Paper Holder/Bail, 19. Paper Guide, 20. Back Spacer, 21. Typewheel, 22. Ratcheting Mechanism, 23. Shift Key Lock, 24. Typewriter Belt, 25. Key Lever Spring, 26. Keybed, 27. Stabilizer, 28. Tabulator, 29. Main Spring, 30. Escape Spring, 31. Return Spring, 32. Shift Spring, 33. Tension Springs, 34. Linkage Cords and Wires, 35. Key Lever Cords, 36. Body and Top Covers. Custom and Hard-to-Find Parts We also provide custom 3D-printed solutions for rare or unavailable parts. If you don’t see what you need, contact us and we’ll design and produce the exact part for your typewriter. How Our Typewriter Spare Parts On-Demand Service Works 1. Submit Your RequestSend us photos or videos, measurements and your typewriter’s model/serial number if available.2. Initial Assessment FeeA €25 one-time assessment fee covers compatibility verification and availability checks.3. Final Price ConfirmationThe €25 fee is applied as a discount toward the final total.