Prototypes? AST89 signed

       

I can't find the designer/potter of this pieces.... they are signed with AST89 or A.ST 89 most of them handincised just one like the one above... possibly a diploma? Underneath one of them has been a HfBK Hamburg sticker with a name which i can't remember... unfortunately the seller ripped it off after i have allready bought it and went for some banana boxes...the whole set has been covered in hamburger newspapers from 1989...I will add some better pics of the incised signatures tomorrow.....
I really like the concept

It has a real industrial look to it almost as if it came out of a laboratory or commercial building. That could also explain the holes that look like they would have taken pipes. Really interesting and by the looks of it you have a lot to keep you busy

           

The little holes are the spouts of the coffee/teapots.... there is a whole set in white glaze and teapots in different colored glaze variations...three forms to make a mould for other shaped pots has been in one of the bowl and there are several other pieces in another design with the same signature underneath..... three of them are cut in the middle to sho the profile of them..... all this and the HfBK Hamburg sticker has been the reason that i thought these might be prototypes by a member or student of the HfBK.... maybe a product design diploma? I mean a stackable hotel tableware concept in the tradition of the TC 100 by nick roericht, etc....
(The HfBK is the short form of the  "Hochschule für bildende Künste"  University of Arts)

Tell you what it first reminded me of is some of that 60/70's plastic furniture that gets shown at retro fairs. Stuff made by the  people linked below. Could it by a range by one of them?

http://en.wikinoticia.com/culture-science/strange-inventions/138178-the-20-classic-industrial-design
http://www.taschen.com/pages/en/catalogue/design/all/01111/facts.kartell.htm

I don't have an idea.... they are all dated 81 just one is dated 89....
I made a little mistake....sorry