The specific meaning is:

It was produced in Bradford, Pennsylvania, USA in July, 28 (since 2, ZIPPO conventional machines have been engraved like this)

8: 28?

g: July (and so on, A is January)

Extended information

Identification method of true zippo

1. The bottom of the shell has the year of production and the month: A stands for January ~B stands for February and so on.

2. The side joint of the shell is broken into five lanes (four lanes in the case of a replica machine, such as the 1941 replica).

3. There is a circular gravure on the top and bottom of the joint.

4. Remove the shell. The cotton felt at the bottom of the movement is very thick ~ about .7 cm.

5. The pattern on the flint is diamond.

6. The cotton thread of the wick is wrapped with copper wire, which will last a long time. ?

7. The fuel of Zippo lighter is a very stable petroleum extract, and this liquid fuel is hidden in the glass fiber movement inside the windbreak wall. The unique design makes it easy for users to judge which product is the authentic Zippo brand.

8. There are two layers of stripes on the flint cutting side of the real zippo lighter. The stripe on the upper layer is a diagonal line from the upper right to the lower left, and the stripe on the lower layer is a diagonal line from the upper left to the lower right. When the two lines intersect, small diamond blocks are formed on the front of the lighter.

Baidu encyclopedia: zippo