A vintage No.0 flat horse head stake forming anvil.

Marked '0' to end of the shank.

Approximately 1⁷/₁₆ by 2⁷/₈ inches (37 x 73mm), a few minor surface knocks, please see images

The ⁵/₈" square (16 x 16mm) shank is 1¹/₈" (27mm) long.

2¹/₁₆" (52mm) overall height including the shank.

14¹/₄oz or 406g in total weight.