Don't know if they're "stylised jugendstil" (they reminds me of bank notes), but I like them! :-)

They don't evoke jugendstil to me, either. Jugendstil is organic; these are mathematical. To be more like jugendstil, try adding some thickness and variation to your strokes to look more like vines or stems.

I agree with Alaskan's comments. They don't feel Jugendstil to me either but I LOVE THEM!!! I would use them if you ever release them!

Thanks for the comments!
I was a bit afraid I deviated from jugendstil quite a bit along the way. I actually did try the different stroke weights with the spirograph-like 'flowers' but thought they looked better in the same weight.
@ Jennifer > no plans of releasing these as I did them for fun, but if you want I can send you the Illustrator file.

Wow Tom! So generous of you. I'd love them!

You're welcome, Jennifer! I have no use for them right now anyway ;-)
Just send me an email account for me to send it to.

That's a nice thing to do. Good call.