they know JACK! The manageress of the Florence Historical boutique of San Giovanni, Mrs Patrizia Mazzoni, on the other hand, knows...exactely...what her staff has to sell. Models, characteristics and so on, because the amount of sales depends on that knowledge. Now I am BAFFLED, after I have confirmed to you not once but TWICE that the 372 is produced with a sapphire crystal why, may I ask, you write....(assuming it has sapphire)???? :-( You're a lefty and have decided to..be perplexed..about the 557? Buy a PAM217...no doubts (real or fabricated) about that model. Prego