Stem at 2 o'clock version doesn't has the seamonster on the back, the 3'o clock version has, usually. Note how the omega symbol could either replace the 12 o'clock marker or be placed under it, even on the same reference (2 o'clock only). Some of the earlier versions of other references, like the 198.001, first came with plain backs and no the "Seamaster" in the dial, while later versions had the text and with and without the plain back. The F300's often has dial variations between the same reference depending on when it was made.
Though this 1970s Seamaster 120m early quartz cannot be called a hummer, I would like to share it cuz of it's beauty in NOS condition. Hope you won't mind I put it under this thread. Thanks & Cheers,
They might not hum but they look interesting!! those bezels look like the inspiration for the early planet oceans
I would think the original 1957 ck2913 SM 300 was the thinking behind that. The Pre-Bonds which came after those shown here had the inner metal bezel ring too.
Recently Ive had a "thing" for hummers myself. That have resulted in Omegas, Bulovas and a couple IWCs
A little history from @Tom Dick https://omegaforums.net/threads/ome...ometer-f300-transformation.25498/#post-283025
whenever i see an unusual watch i really like... @Tom Dick has usually had his mitts on it or its sat on his wrist. lol