A super pair of mid century cufflinks by Hermann Siersbol, Denmark. Stamped to the side of the posts with '925S HS' (925 grade Sterling silver, Hermann Siersbol). 
Mid century era (apx 1960s) and very much in a Minimalist and Modernist style (with the simple plain rectangular square block shape). Each block shape is roughly 21mm x 5mm x 5mm - a goos size that will be seen. Very good for the age, both have a curved hallmarked stem/post and a polished free-moving flat oval back toggle; both toggle very well. They weigh 8 grams together.
Free P&P to the UK. Includes black card presentation box.