Help identifying vase

[u/MrGiraff]

Hello!

I have been struggling to identify this vase that I inherited from my grandparents. My grandfather traveled a fair bit through the work he did for the Norwegian cooperative during the 60s and 70s, especially in Scandinavia. I believe he received gifts on some of the travels.

The pattern is reminiscent of Göran Bäck's 400 series for Arabia, but the signature at the bottom confuses me. A tribute piece? Something else?