British, Irish and World Banknotes

International Gold Corporation Limited, specimen certificates exchangeable for various weights of gold bars (4), no dates, but with zero serial numbers, red specimen stamps and two cancellation holes, all fully engraved and printed by Bradbury Wilkinson, about uncirculated to uncirculated and rare (4 notes)
£100-150

the four values are: 50 grammes containing 1.606 fine ounces troy, 100 grammes containing 3.212 fine ounces troy, 250 grammes containing 8.029 fine ounces troy, and 500 grammes containing 16.059 fine ounces troy