Intro and question

Hi everyone, been reading the omega forums for a while but finally decided to start posting. The fascination with Omega watches was handed down to me from my dad who bought me a quartz Omega in the 70s. I don't know what this watch is and it isn't as impressive as the watches I see here on the forum, but it doesn't matter since it is a personal memory of my dad after he passed away. I've since gone on to purchase a couple of speedies, a seamaster and would like to buy a vintage constellation (lots of research to do). Appreciate if anyone could help identify the watch that started it all.

Incredible that you know the reference to my watch! So much knowledge here. The flat-linked bracelet is really comfortable and light. One feature of the watch I have come to appreciate is the independently adjustable hour-hand just like a real GMT.
Thanks so much.