The Piccadilly Circus is probably the most under-rated of the M620 Cities/Places series of pens. I wasn't a fan of its colour and pattern in the beginning but I have grown to like it.
One of my many old M620 18K Medium nibs. It writes well with a fine but wet line.
Dark Lilac was Lamy's special edition ink of 2016. It is a rich dark purple that does show slight shading from this fine medium. I really like this colour of ink and look forward to using it at the office during the week.