From what I've gathered, the 'Richartz' is Hans-Jürgen Richartz, German painter and glass-artist, designing for Mathildenhütte glassworks. I've not managed to find an approximate date for the vase - yet - but stylistically, it could be anywhere from 1970 onwards.
Edit: Have found reference to a piece for Mathildenhütte signed 'Richartz 80', presumably 1980.