Although I've had older Speedmasters, this is the first 176.0012 mark 4.5 that I've owned. It arrived this morning and seems in lovely condition. It has the 1162/172 bracelet which I think is the original one? It also has the English day dial which I think would be added afterwards? It is a slightly different shade of white background. Anyway, here's a quick shot. I'm very happy with it .
Looking at the state of the luminous indices on the dial and on the hands, I'd say that the day disc is probably original to the watch and dial and hands are service replacements.
I'd say the hands are definitely replacements. @ConElPueblo - would you expect the indices to be the same shade of white as the day disc?
No, they are made of a completely different material and would age differently. My guess is that at some point this has been in the care of Omega for a service and has had dial, hands and date disc replaced. Is the hands/dial lume still active?