Couple of things.
That must be the earliest .004 I’ve seen with an 18,6xx movt.
The dial is poor.
It has heavy rotor rub.
The case is really quite good.
Dials do come up but it might take you a long time to find the right one.
I don’t think anyone would pair a 5-row BOR with this case style.
A 7-row BOR would look so much better.
(That’s not to say it’s not original if the watch really is as early as it appears to be)
The BOR is heavily stretched.
Almost impossible. Much, much easier to be a bit more patient, add a few extra quid and buy a better one to start with.
