Vintage pearl Bracelet

Hello I’ve just rediscovered this lovely early find, the pearls look like natural to me, I cleaned the clasp as the colour was dull as the rest but I’ve noticed that even though that was over 10 years ago, it’s still bright and shiny, makes me think that this might well be a antique to turn that dull over time, tempted to clean it all, I’ve snapped many of these types of bracelets as they can be very fragile. No idea where it’s from