Thoughts on Purchasing This Omega 166.010

Hello All,
My hunt for the perfect 166.010 within my budget continues.
I found this one from Japan for $812.60 USD
That's after a 10% off deal for Mercari Japan.
I can get a further 5% off with a coupon that brings the price down to $791.00 before shipping and handling fees etc.

My main concern is that there are no photos of the movement, and I believe I would be unable to communicate with the seller.
Is it worth taking the chance on this watch, or should I keep looking?
To my eye, the case and bracelet look good. It seems to lack the overpolishing that many of them unfortunately have. But then again the lighting in the photos makes it a little hard to tell.

Also, out of curiosity, does anyone know any information about these 166.010s with no onyx in the indices and hands?
They seem to be less common, and I actually kind of dig the look. I haven't been able to find any information about these. I suppose they would be less desirable to many people without the onyx, but I am no pro.

Anyways, please let me know what you guys think. Thank you.

No movement, no buy

Also the hands looks pitted

I've never minded this, adds to the vintage charm. Why does pitting occur?

Based on the light pitting on the hands and light bubbling, would you expect the movement to be in decent to good condition? The "patina" I can live with. In any case, I have been searching for a 166.010 for several months within my budget that has the original bracelet, crown, crystal, etc., and I have struggled to find any that meets all of my criteria.

I'd hesitate without seeing the movement.