Identification help please

Welcome @RAW1
It looks like a 168.004 hidden crown Connie to me with a 5-row beads of rice bracelet
Jumbos usually have different shaped lugs
What makes you think it is an Asian market Omega? (Do you have a backstory?)
Likely a 561 movement
Are you sure it's 37mm across? Not nearer 35-ish
Size matters 😉
Bezel looks good
Fonts look good too but Do you have a clearer picture of the dial to be sure?
Also side pics of lugs and crown ?

Well I was hoping for a side shot but from the rear view the 'hidden' crown looks like the original too
The watch has seen some life but the case and lugs look well defined
I'm fairly sure it is scratches on the crystal that are distorting the fonts on the dial so my best guess is it's all original
(If there is a small Omega symbol in the centre of the crystal it's likely the original crystal)

Wind the hands through midnight and then back through 9 and then back through 12 if the date changes it's a 561 movement

Even if you only wear it occasionally you should have the watch serviced by a watchmaker who works on vintage Omegas - after all it's at least 50 years old- no polishing the case just a movement service
If you do you, can get the Case reference from the inside case back and serial number from the movement which will help date the watch

All in all a very nice dome dial Connie
A great momento of your brother
👍

You're welcome
So a 561 168.004 will be early to mid 60s -only the movement number will give you a closer date
range
since you appear to be in the U.K. There are a couple of watchmakers members use
I use Watchguy
Good and well priced but difficult to get a slot
A full service (and a sonic 'bath' for the case and bracelet) will cost around £200 if no major parts are required
Others can chip in with their recommendations

BTW your Connie is worth at least double what you were offered -probably more with the BOR bracelet
Definitely change your watchmaker!

I think you said you read a blog
This one?
http://omega-constellation-collectors.blogspot.co.uk/?m=1
Not a lot on .004s but a great section on the movements