Here’s a 1990 instruction guide for the Olivetti ET-2250/Olivetti ET-2450.
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Electronic Typewriter Instruction Guides
The following guide is viewable online and is freely shared. A small donation, however, will make it easier for me to continue to add to this archive. If you have donated, a printable copy of the PDF will be made available to you on request. Thank you!
$4.00
Enjoy the wedge!
E.T.ZONE 
Olivettis are so architectural in this era. 😀
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