Bird-worm seal script

This kind of seal script first appeared in the middle era of the Spring and Autumn period.

[2] The bird seal script is often seen on bronze and iron antiques of the Yue Kingdom (roughly today's Zhejiang Province).

The script was used on bronze and iron weapons, like swords, to indicate ownership or date of completion.

The characters engraved on the famous Sword of Goujian provide a fine example.

The characters on the famous Spear of Fuchai are a good example of this category of seal script.