You Can't Go Home Again: the New rOtring 600 3 in 1 Multipen — Penquisition
Quattro Axtension
Where to find Rotring Quattro Executive Multi-pen refills? : r/pens
Rotring Quattro Multi Pen Black w/refills Used | #19397461
Rotring ARTOS Quattro 0.7 Pencil Ballpoint Pen Red Ring - Etsy
rOtring | Other | Rotring Quattropen Multipen | Poshmark
Vintage Rotring Quattro 4-Function Pen, Gunmetal Grey
Just finished making this custom Rotring Quattro pencil w/ .3mm, .5mm & 2x .7mm. Took some work to get 4 mechanisms to all fit and function, proud of how it turned out :