My "new" Omega

Hello, everyone.
I'm new to this forum; you'll forgive the language but I'm the kind of Italian who speaks his own English.
I received as a gift from my grandfather this fantastic omega. As it doesn't have a box or any other information I'm not able to understand the year, the model, the reference etc. and, why not, the value (even if, given the sentimental value, far be it from me to want to sell it). It was given to me as a gift without a strap so I put on one of my own.
Thank you in advance.

If you need it, I am available to send more photos.

Marco

Hi compatriot. Probably the dial has been refinished

Oh ok, thanks!
is that a good news or a bad one?

Thank you friend! so the goal is to open it, take pictures and come back to you. I trust this forum more than any jeweller.

That's beautiful.

Looks like a 30mm movement (calibre 26X) - some technical info here: http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Omega_269

Even if the dial is refinished I don't think it detracts from the watch and the fact it is a heirloom is lovely.

The strap looks good with it too.

Enjoy!