I am not certain which of my blue M600 demonstrators I like the best. Blue with gold trim or blue with silver trim. I think I like this one slightly more.
This is my newest M600 nib, making its way into my collection with the Turquoise/White pen in April. It is a nice wet broad that writes without issue.
A broader nib brings out more shading in this violet ink that what it exhibited last time it was in use in early 2016. The swab of this ink does sheen golden where the ink was thick but there is no sign of sheen in my writing samples.