In 1677, Scotland operated under a distinct and often precarious monetary system separate from its southern neighbour, England. The official currency was the Scottish pound (Scots), which had been pegged at a fixed exchange rate of 12:1 with the English pound sterling since 1603. However, this official parity belied a stark economic reality, as the Scots pound's actual market value was significantly lower due to decades of economic weakness, trade deficits, and past debasements. The circulating coinage was a limited and chaotic mix, heavily reliant on foreign specie, particularly French écus, Dutch rijksdaalders, and Spanish-American pieces of eight, which were essential for international trade.
The domestic coinage in circulation was largely outdated and insufficient. While Charles II had authorised a Scottish mint in 1663, its output of coins like the merk (13 shillings and 4 pence Scots) was inadequate for the needs of the economy. Consequently, there was a severe shortage of small-denomination coins for everyday transactions, a problem that hampered local commerce. To cope, people often resorted to cutting foreign silver coins into segments or using promissory notes and tokens issued by merchants and burghs, leading to a fragmented and unreliable medium of exchange.
This unstable monetary environment reflected and exacerbated Scotland’s broader economic challenges in the late 17th century. The scarcity of sound coinage constrained domestic trade and investment, while the weak Scots pound made imports more expensive. The situation created persistent pressure for monetary reform, which would culminate two decades later in the ill-fated Darien Scheme—a desperate attempt to acquire foreign specie—and ultimately pave the way for the full monetary union with England established by the Treaty of Union in 1707.