The Parker 61/65 Cloud Series was introduced in 1975 with the Cirrus, it was followed a year later by the Cumulus and Stratus, all the patterns being based on cloud formations. They were very popular but sold at the high end of the market and now they are quite rare and command premium prices compared to standard 61's or 65's.
This is the 65 Stratus dating from around 1976, It is in mint condition with the lightest of storage marks.
The nib is a Broad and writes very well.
Being a new nib it will mould itself to your writing style very quickly.