Confusion over age and details.

I have recently inherited my grandfathers seamaster and have been trying to find out a bit more about it.

He owned it from new, as far as I know, and I’m just trying to figure out about it. I know it no longer has its original bracelet (more about that later), the bracelet on it is just a cheap one from a local shop (I plan on rectifying that as soon as I know what would have been on it originally, please don’t be mean about the aftermarket bracelet.)

I have been trying to find out as much as I can on my own but keep getting confused or reading contradictory information.

The number on the case back is 166.024 - 67. The serial on the movement is in the 26 million range. Where the confusion comes from is that according to what I’ve read the “-67” after the model suggests it was built in 67, the 26 million serial number suggests ‘68, and I found a website with the history of seamaster that said the big triangle was made from 69-71.

I also found one site that suggested that the SC letters after the model number would tell me what sort of strap/bracelet it came with, then didn’t have the SC listed in the explanations.

Really I’m just interested in what anyone can tell me about it. There is a possibility that some parts have been replaced, I just don’t know.

Any help would be appreciated

Thanks. I’m just learning all about this sort of thing. What exactly does that mean?

That makes a lot of sense, and it may not be confusing to everyone in this forum, but to someone like me that has gotten my first omega it can be, believe me.

Are the replacement hands genuine and accurate do you know? My grandfather was not a collector at all. He would have seen the watch as a tool only so if it needed parts he wouldn’t have gone and sourced Nos parts. That’s also why it just has an aftermarket bracelet.