A suspect recasing - help!

[s.mansoor]

Hi everyone!

Came across this piece today and it has precisely what I want desperately from a vintage Rolex - fluted gold bezel, cream dial, date.
Its tagged as a Rolex Explorer 5701/1500 (????). The dial looks like its been refinished, but I have never seen this combination on a 5701 - "Oyster Perpetual / Explorer / Precision".
When I'm looking at the dial from the left hand side picture, something just seems off - is it me or is it all good?
The back cover says the model is 1500 (???). The movement seems to be what Rolex used in the Air King at this time, a 1530.
The caseback is likely not original, is the dial original?
Is this a legitimate model from the late fifties/ early sixties, or simply a frankenwatch?
Would asking for any or all of the movement number, case number, first four digits of the serial number, and a picture of the model number on the case do any help?

Thanks!!
Sam