Yeah it seems to match quite well with some searches I have done,there are a few similar examples from Europe I have found but not a lot of older, larger and more developed trees.
I was over the moon to see a Grevillea listed, finding Aussie natives as available bonsai over here is next to impossible so I jumped on it. Shame it is not a Grevillea but they redeemed themselves with another Aussie so I wont complain.
No idea what to do with though.
It has been hedge pruned so needs a thin out and needs a repot but I will have to do some digging to see how they handle it all, I'm guessing late Autumn over here may not be the best time to do much work on it.
Also curious to see what the flower colour will be.
On further inspection it seems that Spain's very own mallsai producer for some reason does Westringias so I reckon it is a safe bet that this is where it came from.
https://www.mistralbonsai.com/todo-sobr ... ringia-sp/