[IDENTIFY] Tudor Prince Oysterdate - can't find info

[ilikewatchez]

Hi all,

I have a Tudor watch which my late father owned from new. It is a Tudor Prince Oysterdate. I've been trying to get info on it, and found many very similar watches, but none the same as this. I found a site that listed all serial numbers and corresponding years, but this serial sequence wasn't listed? From what i can read (the band has worn into the engraving), it is a model 7966 with serial 578684 (i think?). Is anyone able to reveal any info on this model, how rare it is, what year etc? It's in a lot better condition than it looks in the pics, works perfectly and i wear it daily. It holds very special meaning for me. It was purchased and is located in Australia. I'm guessing mid 60s?

Thank you.