As a historical footnote, "KLM", stood for Ken, Leeland, and Mike, the original group that founded the company. Ken Holladay, Leeland "Mel" Farrer, and Mike Staal.
The KLM Multi-2000 and Multi-2700 were USA imported versions of the Japanese FDK Multi-2000 and Multi-2700 transceiver (Fukuyama Electronics, Tokyo).
MODS.DK has the Instruction Manual for the FDK Multi-2700 (no schematic)http://www.mods.dk/manual.php?brand=_other
You can start with the eHam.net reviews, which will tell you previous or current owners.http://www.eham.net/reviews/detail/1037
Rick, WK4R has SOME information on this specific radio.
There was a European model.http://webpages.charter.net/wk4r/klm/
KG0EW demonstration of the KLM Multi-2700 (YouTube)http://www.youtube.com/watch?v=n_rybAwMB-o
W4QCF supposedly has the Service Manual for the Multi-2700http://www.w4qcfmanuals.com/manualsJ-K.html
Jose V. Gavila, EB5AGV has the FDK Multi-2700 in his collection.
Jose is one of the moderators for the Yahoo Group: Amateur Repairs
He would be a good reference resource in Spain.http://www.jvgavila.com/
In addition, post an inquiry on the AMSAT-NA or AMSAT-UK mail reflectors.
The KLM (FDK) Multi-2700 transceiver was used by 1970s and 1980s satellite operators ..
especially with the Oscar 6/7 and Radio Sputnik (RS) satellites active in that era.