Jaeger Lecoultre P478 Warped caseback and replaced hands?

[Max50916]

Hello! I recently acquired a Jaeger Lecoultre P478. There are two issues that I have. First, the snap caseback is warped so that it doesn't sit flush all the way around the case. It seems to fit well enough but there's still a gap which makes me wary. Is there a way to fix this?

 

Second, the hands on it appear to be quite old but they don't look like other hands I've seen on the same model, could they possibly be original and I've just never seen one like this before or are they for sure replacement hands? Any help is greatly appreciated! Thank you!

[Nibbler]

I have a Seiko sport diver where the previous owner had removed the unscrew case back without unscrewing it.  A Seiko case back normally isn't particularly expensive to replace but I thought I would give straightening the threads out a go. I surprised myself and fixed it. I did it all with little hammer love taps and a semi blunt blade.

[watchweasol]

I would change the case gasket,  Just to be sure its sitting properly in the groove  and check the flatness of the case back on a glass plate. If its out of true using a light hammer and blunt punch gently reform the back.

[rodabod]

The gasket is meant to sit in the rebate cut in the midcase. Correct this, but to test if the case back will work or not, remove the gasket completely.

If the caseback is not flat then I would probably correct it using a brass hammer.

The hour hand is incorrect. The cathedral minute hand may be correct and the sweep seconds hand has been snapped.

[rodabod]

I'd expect the original hands to be luminous dagger types.

[rodabod]

Here’s one of mine.