Rolex Aqua (not Solar Aqua)

[Rascal]

Hi all,
I'm trying to get any information I can on my fathers Rolex. It was gifted to him for his 21st birthday from his father in 1959 in Melbourne, Australia and has now been passed to me. I've tried my best but information in this model is scarce so I'm hoping some experts on here may be able to shed some light.

As far as I can tell, these Aqua (not Solar Aqua) were assembled for the Australian market using a 10C, Cal 710, 15 jewel movement.

Any information on if it would be worthwhile restoring, and approximate cost to do so would also be much appreciated. Obviously the case will need a re-dip, but thankfully the movement appears to be in excellent condition, although I imagine the mainspring needs replacing as it winds forever.

Thanks in advance.