Kathy, you beat me by mere minutes. I've been pondering this one for a while. The dial indices match the "E" variant, but that variant is white dial; and text doesn't match. The "K" sports doubled markers at 12, 6 and 9; while the "E" has triple like subject watch. Both the "E" and "K" have an obvious cutout where band attaches and appear to have a smaller bezel ring. Subject watch when assembled doesn't show this.
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Case markings would seem to indicate a model produced in Europe. I am wondering if this is indeed an international variation that may or may not have an oversized replacement bezel ring that hides the lug cutout?
I also have to say this is the first potential Oceanographer I have seen that is a front loader. I also thunk it's legit. Face variation could very well be a year thing or an international model variance from US produced.
1968 Oceanographer - unknown variant