Ink test; so so close. Aurora blue, Waterman Serenity, Montblanc Royal Blue. Aurora slightly paler, Watermen is in between, and Montblanc is slightly more purple. : r/fountainpens
New Picasso Celluloid Fountain Pen Pimio EtSandy Aurora Blue PS 975 Iridium Fine Ink Pen Writing Gift Pen for Business Office|Fountain Pens| - AliExpress
Aurora Blue: Ink Review – Goulet Pens Blog
Auroura Fountain Pen ink review - Blue - The Writing Desk
Aurora 100th Anniversary Blue Ink Bottle 55 ml Special Edition - Stilo&Stile