Which keys are those? It's possible that they slow down keys which would otherwise risk penetrating the page. If they're on period, comma etc then this is likely the case.
via Koponewt:
https://www.reddit.com/r/typewriters/comments/1ln920i/missing_springs/
https://www.harborfreight.com/200-piece-assorted-spring-set-67562.html
An inexpensive set of replacement springs for typewriter repair.
Top 5 Reasons to Add Kikuletwa Hot Springs to Your Tanzania Itinerary
VISIT OUR HUGE OFFICE FURNITURE WAREHOUSE! Take a virtual tour here: https://youtu.be/0Ez-eB-0u8w (copy and paste) Recycled Office Furnishings 10036 Freeman Avenue Santa Fe Springs, Ca. 90670 We accept Visa, MC, Amex, and debit cards! Mon - Fri: 9am to 5pm, Sat: 9am to 2pm Please call for Saturday hours on holiday weekends www.recycledofficefurnishings.com *alternate phone number: 562 777-2289*
https://orangecounty.craigslist.org/fud/d/santa-fe-springs-index-filing-cabinet/7515311169.html
Esko Kilpi passed away in early 2020
A moment of silence and then listening to this: