This is a Parker 61 DeLuxe pen and pencil set in Black c1956-1962. Parker made three different versions of the Lustraloy stainless steel cap from 1956-1962, the standard version was polished with chrome plate trim, the Classic was brushed with chrome plate trim and the DeLuxe was brushed with gold plate trim. The 61 introduced Parker's capillary filling system, a passive system that only required unscrewing the barrel and putting the section's capillary capsule into the inkwell and waiting. Inside the capsule is a perforated sheet of plastic that absorbs and holds ink while the outside of the capsule is Teflon coated and repells ink. The nib section can be pulled from the inkwell and put back together with the barrel without wiping. The 61 is about 5 3/8 inches long and replaced the larger 51 as the top of the Parker line for nearly a decade until the 75 was introduced.