American, mid to late 20th Century. Ten pens, most Parker 51 fountain pens. One pen is a Vacumatic Double Jewel, engraved "VP" for the style, in dark gray with 12k gold filled cap and arrow clip. Five of the group are standard Single Jewel 51s: one in black with a 12k gold filled cap with thin vertical striping and an arrow clip, and four with silver caps and arrow clips, two in slate blue, one in black, and one in dark green, all circa 1940s. Two pens are Parker 45s, circa late 1950s, in black and blue with silver caps and gold details, both with gold arrow clips. The two remaining pens are Parker 21s, circa 1960s, in green and blue with silver caps and no arrow clips.