Thanks guys for the input.
I am still confused as to what I should do. One thing is for sure, I will never expose any of my OEM vintage watches to moisture.
It is an interesting idea to file down the top of the old crown and see if the threads match. I might try that - especially out of sheer curiosity. As is, the crown is aesthetically quite worn on. I certainly would not use it again.
Perhpas I will try and procure a NOS 24-702 crown since I have a 24-7020 tube on its way to me as I type.
*Edit: I have a 7mm Triplock crown, but I am not sure which model it is. I suppose that both the earlier 702 crown and the later 703 crown share the same thread tap? In essence, what I am getting at is that perhaps all Triplocks fit the older 24-7020 tube? Once I get the 24-7020 tube in the mail I can test this out, but until that time comes, I remain at this board's mercy