Hi,I've had this watch for 30 years and for most of that it hasn't worked due some internal salt water corrosion.A watch repairer looked at it a year ago and said it needs to go back to Omega(can't afford it) and now I'm looking at stripping it down and repairing it but the winding stem comes out all the way.Please could anyone provide any technical sheets or service manual or info on how the stem is retained.Thanks and cheers.