Gorgeous! That blue dial really pops. Your pics and the quality of the piece really do look the real deal. Congrats on the pick up. I would tell you to enjoy it but it looks like you already do
P.S. Nice strap choice.
Most indicitave (aside from the lack of stamps) is the shape of the shock jewel spring retainer. Should have three grooves. Clone only has one like pictured.
All the best to your Dad, wishing him a speedy recovery.
They did a fantastic job on his watch. Should bring him some positive energy once back on his wrist.
JB Weld ought to do it. Just make sure you keep it on the surfaces that need to be adhered. A little goes a long way. You don't want it to squish out and get on the pins where the link should be free to rotate.
Which dealers have you tried? Do you have a good purchase history with any of them? Usually they will not just sell them outright as to avoid becoming a parts dealer. However if you have a good relationship they may help you out in a pinch. Only other thing to do is post a WTB thread to see if another member has what you need.
Good luck.