Vintage Norma 4-Color Multi Pen Ballpoint Chrome Made in USA Rotating

Brand: Norma Item: Multi-color ballpoint pen (rotating selector) Markings: NORMA U.S.A. stamped on the clip Finish/Material: Silver-tone chrome metal with textured guilloche/dimpled lower barrel Features: Rotating knurled center ring; color indicator windows on the barrel (green and red indicators visible in photos) Clip: Integrated pocket clip Country of origin: Made in USA (per clip marking) Condition is nice with very minor expected wear from normal use. It seems to function smoothly and all four colors work, although one color only worked briefly before stopping. Looks great! 5 3/4" long I don't know much about these so please message with any questions. Thank you!