1957- 1976 Write "Zippo" in italics.
Starting from 1977, the flame seal "Zippo" trademark has been added for manufacturing.
Starting from 1957, the base of all Zippo lighters is engraved with a mark representing the year of manufacture, which is convenient for collectors to identify. The year of manufacture has four marks:
""- 1957.
"│"- 1966 to 1979
"/"-1974 to 198 1 year.
"\"- 1982 to 1986
Each logo is used for eight years, and there are at most eight logos, which are engraved on the left and right sides of Zippo trademark respectively. Starting from 1986, in addition to the year, the month mark has been added. On the right side of the trademark, Roman numerals indicate the year of manufacture (II stands for 86 and III stands for 87), and on the left side, English letters indicate the month of manufacture (A stands for 65438+ 10 month and B stands for February).