Hi all, While I have zero vintage watches, I am a huge fan of the dive watches and would like to educate myself in this matter. Especialy interested in SM300 and Ploprof. I found these watch blogs, That Watch and More: Buying a Vintage Omega Seamaster 300 Omega Ploprof Seamaster 600 | Collector's Guide | Omega Passion For my untrained eye both blogs do look like the brilliant, comprehensive sources, but I know next to nothing about the old watches. What is your opinion about those? Thanks for your time.