Here is Zenith Captain I bought at an auction two
weeks ago a Zenith Captain bumper 1953 with a black dial very rare but it’s original see how Zenith
Automatic, Captain even swiss made is written very crisp !
In my opinion the OP watch is a hard pass. I strongly suspect a redial, and in any case the condition of that dial will make you regret the purchase. I know these are much rarer than Seamasters etc.., but take your time and enjoy the hunt.