Featured Hallmarks- Scandinavian? necklaces

My googling leads me to think the hallmarks on these necklaces are Scandinavian?
One green marked 830 and SP missing a centre link and one blue marked Sterling and SP. The SP's have 'wings' on either side.
There is a tag that was with them which may or may not be anything to do with them that says 635 Caleari and some numbers I can't read.
Any ideas?
Thankyou

 

Spot on INH, thats the mark!.
Thankyou. First class detective work

My geography obviously needs work.....

 

Lovely necklaces, K.

That 830 was confusing you, but some Germans used it too.

 

Thankyou. Is 830 still used? As in does it date these at all?.
And just out of interest, do you know what the 635 means on the Caleari loop?. Just in case I ever come across it again!.

 

Most German makers switched to 925 about 1970. These are quite a few decades older, I'd say early Art Deco.
Dating German jewellery can be difficult at times because some Jugendstil, the German Art Nouveau, had a very stylized, Deco-y look. They were ahead of their time in that sense, although they also made 'high' Art Nouveau floral and Mucha-style jewellery.

 

So c1920?.

Off to Google again .

 

No need, I'm sure you know the style. His name was Alphonse Mucha.

 

Yes! That style is so recognisable I'm embarrassed I didn't know who was responsible.
I'm quite taken with this little number.....
La Natura

 

When did you say your birthday was?

 

4th September but you don't have to wait until then........