Of course, they're all lovely but one of them really stands out for you. Which one is it and what makes it so special?
For me, it's my blue-stripe M400. It came with an M which laid down a Sharpie-sized line when I tested it so I put it away while I dithered over buying an EF nib outright or seeking a trade in Classifieds. Fast forward a year, I'm using Stipula Dark Blue in my green-stripe M300 EF and I finally track down Musk Green. I want that in the M300, I think, and I can move the DB to the blue-stripe - but not with that M nib! Then it hits me - d'oh! I can swap the M with the EF on the red-stripe, which has also been sitting unused. C'est voilà!
I've been using it - a lot - for around a month now. While it immediately struck me as even more seriously understated M405 Stresseman - more severe - it wasn't until I really looked at it that I noticed the difference between it and the others. The stripes on the green, red and grey are right at the surface, they're crisp and shiny and reflect light. The blue stripes are also on the surface yet they seem to be deeper down because the dark surface of the stripe appears to sit on a translucent under layer so that when you turn the pen and it catches the light you get these long, iridescent, pale blue strips of light flashing up from the depth - truly a wonderful effect that lends the pen an air of mystery.
My M250 Levenger tortoise also exhibits this iridescent effect and is, indeed, a beauty yet it lacks the air of mystery the blue-stripe possesses.
Edited by chromantic, 13 February 2019 - 08:59.