Stillman & Birn Zeta Sketchbook - 5.5x8.5 Softcover Portrait Archival Retro 1951 Tornado twist-action red

Retro 1951 Tornado twist-action red lacquer capless rollerball with chrome trim

This purple ink has good shading

Ink Name Fragrance Logbook Country of Origin  Germany Color  Blue Dry Time 40 seconds in a Pilot VP medium nib on Rhodia Flow Average Shading Low Sheen No Shimmer No Limited Edition No Water Resistance Low Iron Gall No

and Boing Boing among others

and Lamy's smooth M16 refill (The M22 will also fit with the converted cap)

Stillman & Birn Zeta Sketchbook - 5.5x8.5 Softcover Portrait Archival Retro 1951 Tornado twist-action red216 x 140mm (8 1 2 x 5 1 2in) 26 sheets 52 pages Extra Heavyweight: 270 gsm Shade: White Surface: Smooth Media: Dry & Wet Media, Watercolor, Ink