Lock Down Fillers - 1933-1936 - Burgundy Pearl and Green Pearl plastics. The pearl pattern plastics were used on Vacumatics from the beginning until the end in 1948. The earliest models showed some irregularities to the pattern and it occasionally runs on a more diagonal direction. The earliest pens also used it for the sections and end jewels but this was dropped within the first couple of years of production. Colors include Black, Gold, Blue, Green, Burgundy, and Silver.