Omega Speedmaster Gemini 4 Bezel (Blue)

This is the Blue Bezel fitted to the Speedmaster Gemini IV Limited Edition 3565.80.00 Watch. 
 
This is an Omega supplied genuine bezel which fit the 42mm Manual Wind Moon  Watch case reference 145.022.
 
This was fitted to the model stated above but will fit all the other case references for the 42mm Speedmaster Manual Wind Moon Watch models back to the mid 1960's once they introduced the crown guard Speedy.