The Parker 25 was introduced in 1975 and continued into the early 1990s. This pen carries a clear date code for the last quarter of 1987 and is marked 'Made in U.K'.
The pen is in excellent, unused condition, it came to me as part of a batch of unboxed new old stock Parkers. A sure sign that the pen has seen very little, if any, use is the pristine state Parker 'Halo' logo on the clip which wears rapidly.
I have inked the pen to test it. Sometimes new old stock pens don't write well but this one is a gem. It produces a very smooth and consistent fine to medium line, a very 'easy' writer. The pen is supplied with a new ink cartridge so it is ready to write.
With its somewhat quirky design, indestructible construction and the practicality of a cartridge/converter system this set would make a great vintage every day pen.