Are these vintage Omegas worth it?

This is good advice, OP, and you should heed it. Neither of the first two watches that you posted is worthwhile in my opinion. The 14389 is very overpriced at 900 Euro. I've attached a photo of my 14389 for comparison purposes. I paid $725 USD. The 2375 has all sorts of issues as noted by other members. In addition to that, I second the concerns about buying a watch with a bumper movement. Parts are not readily available, not all watchmakers will service them, and those who will service them will charge more than they would for a manual wind movement. Getting a manual wind as your first vintage Omega is a good way to go in my opinion, but you need to gain knowledge of what you're shopping for before you pull the trigger. That being said, the caliber 268 that's in the 14389 is an excellent movement -- easy and inexpensive to work on, accurate, and very reliable.

To post a picture, click “add photos” as circled in red below, this will load the photo



Then you need to insert the photo into your post



Easy peasy. Note that the photo will insert where your cursor is placed, it took me a while to figure that out.