Orrefors ? Vase. Help with siggy

Got this vase yesterday. It is larger then orrefors I see at 7 1/4" tall. What puzzles me is the signature. I had one before that was signed similar, and the initials were of a sought after designer for them, but I can't find my notes on it. I was hoping one of you may know. I may be off, but it is ringing bells to me. The initials look like ZFS to me.

 

I think from the link below, that my vase was made in 1927 as indicated by the code E 75. The initials still elude me.
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http://www.great-glass.co.uk/glass notes/swedish.htm

 

http://www.glassfromsweden.com/how-to-date-orrefors.html

I can't read the letters. Does it look like AS?

 

Thanks pat! I did look at that site. I don't think it is an A.....but I cant rule anything out. To me it looks like a Z (with a line thru it) and a FS. I'll see if I can get a better picture of it whan I get home this evening. Its very hard to photograph though.