I recently purchased (and scanned) an Instruction Guide for the Panasonic KX-R250. A reference number on the rear cover leads me to believe the year of manufacture is 1986.
Electronic Typewriter Instruction Guides
These instructions guides either came with the typewriters I purchased, or were purchased solely for the purpose of scanning and sharing FREE. A small donation, however, will make it easier for me to continue to add to this archive. Thank you.