Correct, except the serial number tell is XXXD460. The fact that the last three digits never change is what makes these pop as forgeries made as a group. The forger appears to have mistaken the last 3 digits as a movement reference, which is in fact the case in a later Zenith model numbering scheme, and so kept it the same across all the "recreations" as you put it. In reality, it is a case number and darned unlikely to be the same across a range of similar watches.
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