Hi all,
Could someone please tell me if buying an older 345.0808 with the 863 movement any better or worse than a new speedy with the 1863 movement? As you can tell I’m new to these real watches! And all the numbers are a bit baffling.
Thank you.

 

You might find your answer here:

https://www.bobswatches.com/rolex-blog/watch-101/omega-speedmaster-moonwatch-1861-vs-1863.html

Or here:

https://www.fratellowatches.com/speedmaster-professional-caliber-863-reference-359250/

 

No - other than being older (and possibly may have wear in the movement) there isn't much real difference.

Cheers, Al