While the Speedmaster 145.022 was produced during the 80's, they kept some of the characteristics from earlier models such as the copper-coloured movement caliber 861, before being changed to newer yellow-colour caliber towards the end of its production. This possibly unique example bears a prototype dial (with the Singer sticker still stuck on reverse) that is unseen in any production pieces. White in color and featuring a black sub-dial ring, a similar dial in look was finally produced in 1997 for the 40th Anniversary Speedmaster made in 500 pieces for the Italian market. Like most of these test series, it is likely that it was made as a prototype dial and was never launched for the general public until years later. Still featuring its original blue caseback sticker one the case, the movement has no serial number meaning an extract from the archives will not be available.