My grandfathers supposed "Seamaster" gold watch

Hello all. Yes, I'm new to here. Was hoping someone would be so kind as to help me with this watch. After having spent time reading in the fake thread, I'm pretty sure this is a fake one. Am I upset? Eh...not really. I'm wasn't looking to sell this watch, especially since it was given to me from my dad who just passed away yesterday. It has more sentimental value than anything. But. The interesting background on this thing is, it belonged to my Grandfather who was born and raised in Keif Tunisia. He had a radio repair shop & a jewelry store as well. Since they were Jewish, they were told to leave all of their belongings, valuables, etc & were kicked out of north Africa. Basically allowed to leave with pretty much just their lives when the Nazi's took over the northern tip of Africa. My grandmother had sewn as much jewlery into clothing and sent it to France where my Grandfathers brother was living. Thats how they managed to liquidate as much of their money & take it out of the country unnoticed. This watch was one of those items I'm guessing. I guess I'm going to get one of those Bergeon case knives & open this thing up just for kicks. Thank you for any feedback. I can't offer anything in return for any advice, but...I am a life long mechanic & tech on cars. So, I guess if anybody had a car question, I'd be more than happen to help. Thanks =))

Yes. I'll post photos of the movement once I take the cover off. I'm curious as well.
I'm not going to assume the band is gold either until I can get it checked out. If it is gold, someone else on the fake thread had mentioned replacing the watch with a genuine Omega of the same time period & model & use the old band. Who knows how & why my grandfather got duped in the 50's with this thing, because looking at all the other jewelry they had....money wasn't an object. I'm going to guess the markets were flooded with these fakes in the time period.
Oh well. Just goes to show that even the wisest of us still gets the wool pulled over our eyes.