Specifications for Good Delivery Bars

Good Delivery Gold

The physical settlement of a loco London gold trade is a bar conforming to these specifications:

The gross weight of a bar should be expressed in troy ounces, in multiples of 0.025, rounded down to the nearest 0.025 of a troy ounce.

Fineness: the minimum acceptable fineness is 995.0 parts per thousand fine gold.

Marks

Serial number
Assay stamp of refiner
Fineness (to four significant figures)
Year of manufacture (expressed in four digits)

Minimum gold content
350 troy ounces (approximately 10.9 kilograms)
Maximum gold content
430 troy ounces (approximately 13.4 kilograms)

Recommended dimensions (approximately)

Good Delivery Silver Bar

The physical settlement of a loco London silver trade is a bar conforming to these specifications:

The gross weight of a bar should be expressed in troy ounces in multiples of 0.10, rounded down to the nearest 0.10 of a troy ounce.

Marks

Serial number
Assay stamp of refiner
Fineness, expressed to either three or four significant figures
Year of manufacture (expressed in four digits)
Optionally, the weight, which, if included, may be shown in either troy ounces or kilograms

Minimum silver content
750 troy ounces (approximately 23 kilograms)
Maximum silver content
1100 troy ounces (approximately 34 kilograms)
Minimum fineness
999.0 parts per thousand silver

Recommended dimensions (approximately)