dsio
··Ash @ ΩFS SpqrThere has never been a 37.5mm version of the Seamaster Professional/Diver 300M. You may mean the 36.25mm "Mid-size" version of the Seamaster Diver 300m/Professional that was produced up to around 2012. There was also a 28mm version specifically designated as a "ladies" version too. I am told that Omega is likely to introduce a "mid-size" Diver 300M soon.