MB&F HM3 ...the Frog....καθώς και το limited MOONMACHINE by Finnish watchmaker Stepan Sarpaneva is both the first of the MB&F Performance Art pieces by a watchmaker and the first to endow a Machine with a new complication. With MOONMACHINE, Stepan has taken a specially configured HM3 Frog and transformed it with his iconic moon-face moon-phase indicator set in a scintillating firmament of northern stars.