Hi! Thanks for reading my first post!

I have a Speedmaster reduced 175.0033 and I'm trying to learn as much as possible about it.
I found this page on the omega site, not a ton of info there.
https://www.omegawatches.com/en-us/watch-omega-speedmaster-reduced-da-175-0033

But I'm curious about what the .300 and .900 numbers mean.

Thanks!!

 

Maybe they were starting the current system of model description. So the black would be 175.0033.300. Just a guess, though...