4395: This is a pin I traded for. I don't track sources, so can't say much about legitimacy of my exact pin. But in general I have believed it to be legit. I have this pin logged as 4395. The major difference on the front is the face. Your's is tan, mine is white. The picture on Pinpics also shows the white face. My backside is also very different, but probably appropriate for the release era. There is no date on the pinpics listing, but the pin number alone means it was well before the mickey head waffle pattern was started on pins. My conclusion is 4395 is not your pin.
57870: I have a lot of Mickey Mouse pins, but I do not believe I have this one (have not had time to look through them all, I lucked out in locating 4395...