For sale is a vintage flat foot crown in very nice used condition with a diameter of aprox 6.7mm and height 3.35mm. Stem thread size is 12 but I have included a stem adaptor (shown in photo) to convert it to 9 to fit Seamaster 300's. I can include other sizes of stem adaptor if needed. Price is £195 gbp + £7 U.K postage or £10 worldwide (net.) Many thanks!