Dutch East Indies Stuiver Bonk: Numismatic Guide

Illustrated Specimen Details: Copper Stuiver Bonk

Example Specimen: 2 stuiver bonk, 1810 (Netherlands East Indies)

Authority & Heraldry: The obverse displays the denomination 2:S surrounded by pearls laid out in the shape of a rectangle, representing 2 stuivers. The reverse typically features the date, also surrounded by pearls. On this particular specimen, a portion of the date is lost, but the weight corresponds exactly to the year 1810 according to numismatic catalogs. This emergency copper ingot was manufactured on the island of Java.

1. NETHERLANDS (DUTCH) EAST INDIES (1796-1818): 1 bonk stuiver = 1 stuiver (fractional unit: 1/20 guilder)

The name of the stuiver bonk coin reflects the unique nature of this currency. "Stuiver" is the name of an old traditional Dutch coin (equal to 1/20 guilder). The word "bonk" translates from the Dutch language as a "big piece" or a chunk cut from a copper ingot. These coin-like rectangular copper ingots were issued by the Dutch East India Company (VOC) on Java. In some ways, they conceptually resemble macuquinas — irregularly cut silver ingots with stamped coats of arms. Both belong to the category of hammered or hand-minted coinage.

History and Economic Role of the Bonk Stuiver

The bonk stuiver was an emergency colonial coin issued in the Dutch East Indies (present-day Indonesia) and Dutch Ceylon (Sri Lanka) during the late 18th-early 19th centuries. At that time, the colonies of the Dutch East India Company suffered from a chronic shortage of small copper coins. The growing colonial economy required large quantities of low-value money for local trade, but regular supplies from Europe were insufficient.

The monetary system was defined as:

• 1 guilder = 20 stuivers
  → therefore 1 bonk stuiver = 1/20 guilder

The Emergency Copper Coinage (1796-1818)

At first, coins for the Dutch Indies were minted in the metropolis, but in the middle of the 18th century, a local mint was opened in the city of Batavia (modern Jakarta). In 1796, due to a severe shortage of standard money signs, colonial authorities introduced temporary substitutes.

A batch of long copper bars was imported from Japan. Instead of producing traditional round coins, mint workers cut rectangular blanks directly from these bars. They manually stamped the denomination on one side and the date on the other. This method allowed money to be produced quickly and cheaply. Several denominations were issued, including 1/2, 1, 2, 4 3/4, and 8 stuivers.

The earliest and largest pieces weighed more than 150 grams. However, over time, the size of the stuiver bonks gradually decreased. By the end of the issue period, their weight did not exceed 10 grams.

Numismatic Perspective

From a numismatic perspective, bonk coins are among the most unusual colonial issues ever produced. Because they were simply cut from copper rods, no two specimens are exactly alike in shape or size. They are frequently classified as emergency or necessity coinage, prioritizing raw commercial function over elaborate artwork.

As regular coin supplies improved during the 19th century, bonk coinage gradually disappeared from circulation. Today, their crude appearance, heavy weight, and highly unusual rectangular format make them instantly recognizable and highly sought after by collectors of global colonial coinage.