A vintage mid-century teak Gianfranco Frattini bookcase room divider in teak

A vintage mid-century teak Gianfranco Frattini style bookcase room divider in teak.
 
This bookcase is in the style of Gianfranco Frattini which retail between 10-20K, however there are no makers marks/labels attached.
 
The modular bookshelf/room divider consists of 5 bays (6 uprights) and 26 shelves and 3 cabinets. Each shelf or cabinet can be adjusted  as they sliding in and out of the 16 'teeth' that are on each side of the uprights.
 
The cabinets are not actually cabinets but doors that attach to an upper and a lower shelf giving the impression that they are cabinets. Inside there are an additional 3 shelves that are slightly smaller so the fit behind the doors which give a total of 42 shelves in total.
 
The bookshelf/room divider is finished on both sides so can be displayed in the middle of a room. 
 
A superb piece of brutalist design!