6 Stuiver `Scheepjesschelling` Dirck Bosch, with BP, piedfort at triple weight

West-Friesland's scheepjesschelling coinage was produced at the Hoorn mint, one of the smaller provincial mints of the Dutch Republic operating under perpetual tension with the States-General over striking standards. The "BP" privy mark identifies Bosch as the mint master responsible for this issue. Piedfort production at the Dutch provincial mints was not a commercial exercise — these triple-weight strikes were produced as presentation pieces or official samples, almost certainly intended to demonstrate die quality and planchet preparation to provincial authorities.

Surviving West-Frisian piedforts from the 1670s are genuinely rare. The decade was financially strained by the Rampjaar of 1672 and its aftermath, when French invasion disrupted Dutch trade and strained mint output across the republic.