Rolex 1603 Authentication - some concerns

[Season]

Evening chaps,

Saw this online. I enjoy testing my fake spotting abilities, but I suck with Rolex. To me, everything looks in order. The markers all seem legit. What bothers me is the SWISS on the dial, I was under the impression vintage DJs from the 70s (which I think this is) used Tritium. So it should read T Swiss T or similar.
Sorry for any blurry images, they are not mine, just what was posted online.
In addition, i believe the date wheel is slightly misaligned. Hard to tell, but it looks like it good be. However, I also understand the teeth on these date wheels often went with age, so perhaps it's of need of a service.

Thanks
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