Based on this verification mark, the jug dates to the late Victorian or early Edwardian era, around 1890 to 1910. The Number "2": This is the unique inspector / authority number.
Antique Victorian Copper Haystack Measuring Jug
Antique Victorian Copper Haystack Pint Measure Jug, VR Lead Verification Stamp
Antique Haystack Quart Copper Jug with Impressed Assay Mark.
Antique 18th Century George II Half Gallon Copper Haystack Jug Circa 1740
Large Antique Copper Haystack Jug / Pitcher - 4 Gallon
Antique Victorian Copper 4 Gallon Hallmarked Haystack Measuring Jug