Hello, I'm wondering what means or stay for these acronym/abbreviations: 1) 14'' H.R.C. 14 are the lignes of the Valjoux 22 movement used by Doxa, but the letters stay for? 2) ELS on this Rolex's bridge of a Valjoux 69. 3) HYS on a gold Patek Philippes' folding clasp. Thanks for your help.