How did the author recognise the lady who was extricated from the car encrusted in the wall of Havana Riviera Hotel after the storm?

The author recognise the lady who was extricated from the car encrusted in the wall of Havana Riviera Hotel after the storm because of the gold ring she wore which shaped like a serpent and her emerald eye helped the author to identify the similarities with the lady which he knew from Vienna who used to wear the same type of ring and who had emerald eyes.