'Guineas' is correct and the conversion is what I have been told. One guinea = one pound, one shilling.
In 1957 the Victa was selling for the magic price of �49/18/0. So 60 quid for a Pope meant the Pope was significantly more expensive.
As I understand it, some prices were expressed in guineas as 'snob value', signifying a superior products for those with class consciousness.
One of the great things about decimal currency was not just that it was easier - and logical - but it didn't have the historical baggage of a silly class system embedded in it.