This is a mans CYMA wrist watch, purchased early 1950s,  automatic (Cymaflex,)  with adjustable strap FIXOFLEX Pat no. 697592GB.  We think it is chrome plated because round the outside edge of the face it has worn.  It was just recently serviced.  The face is pitted some.  It has been worn a lot, so is showing signs of wear. My husband had a new winder fitted because he could not use the original as it was rather small but the original one is available with the watch.