27455 USB is one of the more common Latin American SSB freeband frequencies (I mostly hear Spanish and Portuguese on that frequency) so hearing Italian stations is a nice catch! When the band is really open 27455 USB can be one of the busiest frequencies on the "high channels" (above 27405/CB channel 40), sometimes even more congested than 27555 USB.
Next time the band is open to Europe check out 27465 kHz AM (commonly referred to as "27.465 AM" or "canale 45" by the operators that use that frequency). 27465 AM is basically the 'Italian Superbowl' frequency (compare to 26585 AM for Mexico, 26705 AM and 26715 AM for Puerto Rico/Dominican Republic/Florida and 27025 AM for the USA).