A fab pair of mid century square cufflinks by A. Dragsted, Copenhagen, Denmark. Stamped to the side of the posts with their logo and 'AD Sterling Denmark' (925 grade sterling silver). 
Mid century era (apx 1960s-1970s) and very much in a Modernist style (smooth and simplified). The smooth flat surface area is a brushed satin and the central raised three-point motif is shinier. Each square shape is 16mm x16mm. The simple design is rare and hard to find.
Good for the age, both have a curved hallmarked stem/post and a polished free-moving oval back toggle; both toggle freely. They weigh 13 grams total. (Photos taken on a macro setting).
Free P&P to the UK. They come in a presentation box.