Hi all,
Newbie here. I've just picked up a JLC  amongst an eBay lot of old watches. It's a  mid 50's sword hand mid size stainless steel with a cal 478 movement. Missing however is the second hand and the crown. Does anyone know where I might source these- eBay isn't great with this cal.? what part number should I be looking for?  Stem I think I got right and is coming. I have a line on a slightly more modern JL stainless steel crown but it is a 5 mm...Is this too big? The movement otherwise looks to be in good condition and everything seems to work as it should once a revision is done. 
Thanks in advance for any replies...
Chipsotoole