I really like your experiment (timed paragraph, index-finger vs full touch) because it puts the physical ergonomics of typing on these machines front and center — something many of us overlook until our fingers are sore.
I wholeheartedly agree with your experience of the Erika 10- it is widely regarded (in my and many others’ experience) as one of the lightest-action machines you’ll find. As one reviewer put it, “the keys seem to float on the wings of angels.” When you say yours “required the least effort”, that rings true to me.
On the flip side, your observation that the Underwood Universal “slowed you down because I actually had to push the keys all the way through” also aligns with many users’ reports. Some portable Underwoods are fantastic, but others are described as “delightful to look at but … heavier to type on.”
If I may throw in two suggestions for all here:
• Try to assess whether a machine’s key-action feel is more about design (lever geometry, spring tension) or condition (wear, lubrication, adjustment). A well-serviced machine can surprise you.
• What about machines you’ve typed for, say, 30-60 minutes in one go: which stayed comfortable, which caused finger fatigue? For example: machines like the Olympia Traveller, Hermes 3000, or later highly-serviced Underwoods might be worth comparing.
So which other models in your collection feel easiest on the fingers for longer sessions, with just the slightest touch — and did you measure this by speed, comfort, or both? I’d love to hear your findings (and yes, your mileage may vary!)
Ezra
