The VOC duit was the workhorse of small transactions across the Dutch colonial archipelago, struck in such enormous quantities that individual provincial mints competed fiercely for the contracts. West Friesland's issues are distinguished by their mint mark and carry a reputation among specialists for inconsistent flan preparation — not a strike problem, but a documented issue with the copper quality sourced during the 1750s, producing coins with a characteristically porous surface that is not damage but metallurgy.
The VOC duit was the workhorse of small transactions across the Dutch colonial archipelago, struck in such enormous quantities that individual provincial mints competed fiercely for the contracts. West Friesland's issues are distinguished by their mint mark and carry a reputation among specialists for inconsistent flan preparation — not a strike problem, but a documented issue with the copper quality sourced during the 1750s, producing coins with a characteristically porous surface that is not damage but metallurgy.