Do you prefer a black or blue dial on you watches? Once you answer this you have your answer.
The PO with the d variant is rarer I suppose in terms of numbers available but the newer materials and movements of the seamaster tip it for me. If you prefer the black dial then buy it in black.
You will get 10% off a new one at least which makes it a great buy when you view the whole package of 5 years worry free ownership.
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