[GreenKeys] odd keytops on model 15,, why? See attached photo

[COURYHOUSE at aol.com]

early attempts at  ergometric design to  keep the    fingers healthy..
 
early ttys had   hard faced  keys   and   then  the  cush ones  were also 
overlay... all my   15s   have cushy keys on them
 
 
 
 
In a message dated 4/29/2013 6:31:04 P.M. Mountain Standard Time,  
keelan at grenander.com writes:

Are they  are spring loaded? I've seen spring loaded key tops on an 
underwood  typewriter, and couldn't figure out why. They were pressed on over top 
of the  normal key tops, so they weren't replacements. I have no idea what 
purpose the  spring loaded tops served.

- Keelan 

On 2013-04-28, at 8:42 PM,  COURYHOUSE at aol.com wrote:

> odd keytops on model 15,, why? See  attached photo
> <0  
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