American, circa 1950s. Boxes in varying styles with pens paired. The first box is a dark brown leather with gold accents and visible wear, embossed "51" in black and labeled "BOX NO. 254" on bottom. It contains two Parker 51 fountain pens: the first is in light gray with a silver cap, small band of horizontal stripes at base, with a gold clip and blue diamond marking, and the second is in a slate blue with a 12k gold filled cap with thin vertical striping and an arrow clip. The second box is a cream and dark brown leather case, embossed "51" on the top in dark brown, and labeled "BOX NO. 274" on the bottom, with some wear. It contains a set of two black Parker 51 writing implements: one fountain pen and one mechanical pencil, both with silver caps and silver arrow clips. The third box is a khaki colored leather box with gold accents, with no external markings but marked "PARKER '51'" on the inside and with visible wear. It contains two Parker 51 fountain pens with silver caps and gold arrow clips with blue diamond marking, one pen in a brighter red and one pen in a darker reddish brown.