The PX 1000 had quite a few variations, with and without encryption, this obviously was without encryption as that is what is written with a marker on the front “no encryption function”.
Title : Philips PX 1000. Een communicerende tekstverwerken in miniformaat
Publisher : Philips Nederland
Language : Dutch
Year : 1984
Subject : Philips PX-1000 + PXP 40 printer
For lot more PX 1000 information see The Cryptomuseum