Big piece of British bronze from the Birmingham Workhouse - quite possibly the largest numismatic object struck for actual circulation by Matthew Boulton's steam powered machinery - this weighs almost 2.5 ounces.
That coin has certainly seen some history! Difficult to be sure if it is a halfcrown or a Shilling without a scale. It is, however, definitely a Chester coin because of the C beneath the bust.
Here from my collection is one of the 1689 Half Crown who referred to: