Dealer serviced usually means corners are cut, not as desirable as serviced by reputable watchmakers.
Price wise, it's not bad if the bracelet is included, along with pictures of the inside. That is if the service is of good quality, and it still depends on the reputation of the dealer - so do some research on how good they are. A lot of us here prefer to buy the seller, not just the watch, especially when your knowledge about the watch is limited.
Personally, I think the case polishing is not good and I wouldn't buy it because of this. If you've ever seen a new-old-stock case, a good refinish or just a good condition case, I don't think you can live with looking at that soft case ever again.
Look at the edges of this NOS case:
https://omegaforums.net/threads/the-nos-thread.7352/#post-86833
Here's a good refinished one:
https://uhrforum.de/attachments/817...v-176-009-mit-neuer-werkrevision-o-s-m_02.jpg
This one could be either good refinish or good condition:
https://uhrforum.de/attachments/110...r-mark-iv-referenz-176-009-speedy-mark-iv.jpg
The pulsometer crystal is available as replacement, so just look for a good condition watch and replace the crystal when you have it serviced - the first thing to be done after acquiring a vintage watch.
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