The stainless steel fittings were designed and made by myself in my workshops in Manchester. When the instrument is being played the bellow securing strap telescopes away neatly and swings round on its gimbaled universal joint to clip onto its securing stud.
The fittings were originally developed for my traditional wooden model but work equally well on the carbon fibre accordion, with the brushed stainless steel complementing perfectly the black of the carbon fibre.