In the 1980s this model was available as an IDK (impuls druk kiezen, pulse dialling) and TDK version (toon druk kiezen, touch tone), in various colours. With regards to functionality this model does exactly the same as the T65. Probably PTT added this to their range as de Luxe model with a modern look and feel.
Indeed it is a very robust model and it looks much more modern than the T65. Nevertheless this phone, actually a Siemens Masterset 111, was already introduced in 1973.
Unusual in this case is that Philips is printed on the sticker at the bottom as the manufacturer. Even stranger is that it was not made by Philips at all, but by Siemens in Bocholt. If you peel away the Philips sticker, the original Siemens sticker is revealed.