hi everyone, I know very little about omega watches and recently was given one by my grandparents- wanting to find out a)whether it’s authentic and b) what year it’s made/what it was worth etc. the info on the back reads “ Omega 18kgold 1130-4700 0003 Swiss”
Have attached a couple of photos to assist. I’m in a australia, but there is a possibility it was purchased overseas. Thanks!

 

I think the "Japan Movt" written on the dial is probably all you need to know about its authenticity.

 

When a counterfeiter is honest while still selling a fake. Love the Movado Museam watch dial.

 

At least semi-honest. I doubt that watch has much, if any, water resistance.