is this authentic?

Olhenry56

The band is not original, and from the little I've seen, this reference usually (always?) came on a strap, so that's a good choice.
I'm sure some one on the forum will be able to recommend a watchmaker in your area. If you type this in Google you'll see previous discussions that might help:
site: omegaforums.net watchmaker Colorado

I'd just have it serviced and have nothing done cosmetically except for a new crystal. The wear was put there by your father and would be a nice way to remember him (I could personally even live with the cracked crystal for that reason). The dial looks pretty nice, and that's most of what you see.

Also, it's authentic. It starts working when you move because there is a rotor that rotates with your movement and winds the watch.

Nicol

I read omega's are silent but when I hold it to my ear I hear a very quiet ticking.

wagudc

Here is a thread on finding a watchmaker in your area.

https://omegaforums.net/threads/vintage-omega-servicing.125173/

The watch is an automatic, which means there is a spinning weight called a rotor that winds the watch when you move it. The watch should be serviced if you plan to wear it. During the service the watchmaker will completely take apart the watch, clean and inspect each part, and replace those that need it. This will resolve the stuck crown and make sure everything is in good working order. The movement looks something like the one in the picture below, the big half disk is the rotor.

Olhenry56

I wouldn't worry about that. I had the same concern with my first Omega because I probably read the same thing as you, but I was assured by the experts here that not all are silent. That may improve after servicing it. I suppose there is a chance the movement was replaced, but I think that's very, very, unlikely with this model.

Davidt

No one has said it’s not authentic.

It’s 100% genuine, just low value. You can hear all vintage omegas from this period if you hold them to your ear.

Davidt

It’s 100% genuine

Nicol

- but I can't pull up the crown. It's stuck. I chipped two fingernails trying.

wagudc

I don't think the difference in those certifications is really important here. I would ask if the watchmaker has an Omega parts account. Omega will only sell parts to watchmakers that meet their standards, others will have to use generic parts or parts from a donor watch. A service is likely to cost $200-$400 or possibly more if a significant number of parts need replaced.

Keep and mind when members here give you an assessment of value, they approach it from a collectors point of view. The value to a collector is low because the design is from an era that is less popular these days, and the gold plating has worn through in places like the corners. Collectors generally prefer stainless steal or solid gold with crisp corners. However, this is the only watch that your dad wore for years and that makes it priceless to you. I wear my Dad's old Omega and it is a great memento. The 700 series movements (mechanics) are very well-designed and are top quality. It is a solid watch and will give you many more years of use. Don't worry about the value, because I doubt you plan to ever sell it.

vintage hab

The crown is probably a “screw down crown” which is why it seems stuck. First, unscrew the crown (turn counter clockwise) and it should pop out a little. You will then be able to wind it manually. Pull out the crown a little more and you should be able to set the time. When finished, push the crown all the way in, and screw it back I’m while continuing to push in it. It will catch on threads and be screwed back in.

It’s a great heirloom: have it serviced by a competent watchmaker and have the crystal replaced. You’ll be good for the next 5-10 years. Wear it in good health.