[melt]

The removal of the crown from the stem should be simple. Carefully grip stem with vice or pliers were it will not get damaged with some tape around to protect it and wind the crown anti-clockwise. You might need another set of grips if this is very tight. Check new crown winds on fully and fits in watch and hands move and day/date sets. Take out of watch then apply some glue on stem end and wind new crown and leave to set. If you have difficulty with day/date or time setting it will probably be to much stem wound into crown.