It looks "real" to me if that's what you're asking, but I am not sure what you bought it as... Meaning, if you bought it as a pre-moon, then it's been cobbled together. If it's a 70's-80's tritium piece (like i think it is), you're probably ok. The serial number will be inside on the movement I believe and you can date it with that. The inside of the case back will show the reference number. Just take some pics and post again once you get her opened up...

Breathe deeply...she likely just needs a service.

Mike