I thinks it’s a 1098 with 540 which would be correct for this case shape, but a clasp swap happened at some point with whatever they had on hand
definitely plausible but I can’t see the motivation other than maybe the original one was damaged?
Unless the seller represented that the watch was serviced and sold with some sort of warranty, you're likely out of luck. It's a 55+ year old watch that was presumably sold as is. You shouldn't buy a vintage watch if you're not prepared to accept the risk of parts breaking or the watch needing repair.
I messaged him through eBay asking about timekeeping and he told me it was keep great time and functioning as it should. Even sent me a video of it working. It sounds like the shipping company is at fault.
As others have said, an old watch shouldn't be expected to be perfectly fit for use. They will almost always have issues, your watch has issues that can be cleaned up with a proper service. That's how the vintage market works. I'm always surprised when relative newbies want to jump in to the vintage pool and then are surprised when their prized purchase has issues.
