George Jensen Vivianna bangle watch parts/advice

[FrancisH]

Following on from my introduction post I would be grateful for some advice in getting this watch back in working order,it belongs to my wife, was borrowed by my daughter who took it locally for a battery replacement , and the rest is now my problem!! please see attached photos

The watch has an ETA 956-032 movement and Id like to know if someone can point me in the right direction for the female part of the split stem inc crown that is/are missing, Im unsure whether the stem and crown are one piece or 2 pieces. the total length of the female part would need to be approx 5.5mm to the outer edge of the stem tube (+ if crown separate)  the spec for the stem is tap 10

There are 2 other issues I would like advice on 

1) the dial is mirrored glass bonded to a thin brass plate with locating lugs which press fit into the movement. The inner surface of the case has a machined groove which at the moment the dial sits up against, Surely the groove should have an "O" ring fitted to cushion the glass dial as I cant imagine the watch would be designed otherwise

2) The back is held on by 4 screws ,should there not be a gasket between it and the case ?

Any help would be much appreciated ,thankyou Francis

[jdm]

If you look on cousins uk you can get the missing stem portion ETA956101964 however I would rather fit a single piece stem to avoid the possibility of losing it again.
They have a decent selection of crowns, you need a waterproof one that takes in the pendant tube.
An O-ring between dial an case is absolutely unusual but
You can get the caseback gasket by size.

[FrancisH]

thanks jdm, the problem with the one piece stem is that you can fit it but theres no way to remove it once assembled as the pendant tube is attached to the back so theres no access to the button to release the stem

Regarding the dial O ring it may not be normal but surely its needed as direct glass to metal contact isnt the best combination

[jdm]

2 hours ago, FrancisH said:

thanks jdm, the problem with the one piece stem is that you can fit it but theres no way to remove it once assembled as the pendant tube is attached to the back so theres no access to the button to release the stem

Right, I didn't noticed that.

2 hours ago, FrancisH said:

Regarding the dial O ring it may not be normal but surely its needed as direct glass to metal contact isnt the best combination

I really don't think any gasket goes there. Glass, mother pearl and such delicate dials are directly fitted to metal. Nothing happens because the pressure is uniform and well distributed.