Jaime, as mentioned at the top left of each page, requests for timepiece values are forbidden.
Regarding the other requested info, Fludo watches were products of the Fluvius Boillat company of Les Breleux, Switzerland. That's basically all that's stated in my reference books. Landeron 51 movements were manufactured from 1937 until 1970.
Pink gold waned in popularity sometime during the 1950's, if I'm not mistaken, so that should help to narrow the timeframe.
Though you didn't ask, unless you know that it has been done recently, it is a wise investment to have newly acquired watches serviced, if you intend to use them.
Kate






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