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Coinage of India

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Hoard of mostly Mauryan coins
CNG Coins · CC BY-SA 3.0

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Through History of India, Copper and Coin

The tradition of Indian coinage in the 2nd millennium evolved with Indo Islamic rule in India. and the British Raj in the 19th century.

Origin of currency in Indian subcontinent

Prehistoric and Bronze Age origins

Cowry shells were first used in India as commodity money. The Indus Valley Civilisation may have used metals of fixed weights such as silver for trade activities which is evident from the DK area of Mohenjo Daro from the late Harappan period (dated 1900–1800 BC or 1750 BC). D.D Kosambi proposed a connection between Mohenjodaro class IV silver pieces and class D pieces with the Punch marked coins based on their remarkable similarity and identity between D-class weights. The remarkable similarities between Punch marked coin symbols with those appearing in the Indus seals have also been highlighted. Chalcolithic unmarked gold disc discovered from Eran have been dated to 1000 BC and due to their lack of ornamental use, it has been proposed that it was utilized as an object of money A similar gold token piece from Pandu Rajar Dhibi has also been interpreted as a coin, it is hammered on the edges and bears parallel marks, although weighing 14 grams, a quarter of the piece is missing hence its full weight of 21 grams would conform to the ancient coinage weight standards of India and confirm the vedic literary references of circulation of gold tokens in that period. Similar interpretations have been made regarding the use of silver circular objects from the Gungeria hoard.

Weight standard

Since the Bronze Age, ratti (0.11 or 0.12 gram) or the weight of the Gunja seeds have been used as a base unit for the measurement of mass in the Indus Valley civilization, the smallest weight of Indus was equal to 8 rattis (0.856 gram) and the binary system was used for the multiple of weights for instance 1:2:4:8:16:32, the 16th ratio being the standard regular weight (16 × smallest weight), etc. This weight system seems to have been replicated in the earliest Indian coins. The Masha coins were quarter Karshapanas, karshapanas themselves being the quarter value of Karsha (13.7 gram, 128 ratti) or 32 ratti which is the same as the regular weight used in the Indus Valley civilization. This standard (of 32 rattis) has been declared as Purana or Dharana by Kautilya. The Karsha weight differed based on the differing values of mashas, for instance arthashastra mentions a masha equal to 5 ratti as opposed to 8 ratti mashas which is described as the prevalent standard during Kautilya's time. The Gandharan quarter svarna coins conform to a different 5 ratti mashas system mentioned in the Arthashastra as do the copper punch marked coins (80 ratti, 146 grain, 9.46 gram). A shatamana (lit. 100 units) weight system has been first mentioned in Satapatha Brahmana which is equal to 100 krishnalas, each krishnala being equal to one ratti. The weight of the ancient Indian silver Karshapana and satamana coin is given below:

1 Satamana = 100 Rattis / 11 grams of pure silver

1 Karshapana = 32 Rattis/ 3.3 grams of pure silver

½ Karshapana = 16 Rattis

¼ Karshapana (masha) = 8 Rattis

1/8 Karshapana = 4 Rattis

Early literary references

There is evidence of countable units of precious metal being used for exchange from the Vedic period onwards. A term Nishka appears in this sense in the Rigveda. Later texts speak of cows given as gifts being adorned with pandas of gold. A pāda, literally a quarter, would have been a quarter of some standard weight. A unit called Stamina, literally a 'hundred standard', representing 100th krishnadas is mentioned in Satapatha Brahmana. A later commentary on Katyayana Suryaputra explains that a Stamina could also be a 100 rattis. All these units referred to gold currency in some form but they were later adopted to silver currency.

Panini's grammar text indicates that these terms continued to be used into the historical period. He mentions that something worth a nishka is called naishka and something worth a Śatamāna is called a Śatamānam etc. The units were also used to represent the assets of individuals, naishka‐śatika or naishka‐sahasrika (some one worth a hundred nishkas or a thousand nishkas).

Panini uses the term rūpa to mean a piece of precious metal (typically silver) used as a coin, and a rūpya to mean a stamped piece of metal, a coin in the modern sense. The term rūpya continues into the modern usage as the rupee.

Ratti based measurement is the oldest measurement system in the Indian subcontinent. The smallest weight in the Indus Valley civilization was equal to 8 rattis and were the bases for the weight standards for the first Indian coins in the seventh century BC. Ratti and is still used in India as Jewellers weight.

Theory of West Asian influences

Scholars remain divided over the origins of Indian punch-marked coinage (PMC). What is known, however, is that the earliest extant evidence, of silver currency, are bent silver bars, in the North West of the sub-continent, and consistent with those found in Iran, from the 7th century BCE Nush-i-jan hoard, and the 4th Century BCE, Chaman Huzuri (Kabul) hoard. Extant evidence of the earliest Metal currency in the South and East of India is later than the North West, and coeval with the Northern Black Polished Ware culture, minted before the Maurya Empire (322–185 BCE), with radio carbon dating indicating post 5th century BCE dates. According to some scholars minted coins spread to the Indo-Gangetic Plain from West Asia.

According to Joe Cribb (2003), a "marriage between Greek coinage and Iranian bar currency" was at the origin of Indian punch-marked coins, which used minting technology derived from Greek coinage. Daniel Schlumberger also considers that punch-marked bars, similar to the many punch-marked bars found in northwestern India, initially originated in the Achaemenid Empire, rather than in the Indian heartland:

“The punch-marked bars were up to now considered to be Indian (...) However the weight standard is considered by some expert to be Persian, and now that we see them also being uncovered in the soil of Afghanistan, we must take into account the possibility that their country of origin should not be sought beyond the Indus, but rather in the oriental provinces of the Achaemenid Empire"

— Daniel Schlumberger, quoted from Trésors Monétaires, p.42.

The Western origins hypothesis had previously been proposed before any serious attempts were made in the study of PMC coins such as:

  • John Allan (1936), asserted "the idea of a coinage came to India in the late fifth or early fourth century B. C. from Achaemenid territory, conjecturing that the bent bar or wheel-marked coins "were struck on a Persian standard and represented double sigloi or staters....". Arguing no evidence coinage, in India, exists before the Nanda period, with the earliest finds from: Golakpur, Paila, and Set Mahet indicating the region in which local punch-marked coins originated.
  • James Kennedy (1898), the PMC were copied form Babylonian originals as a result of trade between India and Babylon in the 6th century BC.
  • James Princep (1835), who proposed the Greo-Bactrian (256-100 BCE) origin of the PMC coins, this was also supported by C.W King. Princep later admitted that due to the archaic nature of PMC, they were older than the Greo-Bactrian coinage.

The weight standard of the Gandharan, Shatamana, Bent Bar coins is asserted, by like of Cribb, Allan, and Schlumberger, as twice the Sigloi weight and hence represent the Persian weight standards. Other scholars such as Vincent Smith recognised the Satamana as 100 ratti weight system of Iron Age in India.

Cunningham (1891) asserts that ancient India had an abundance of gold but little silver. The gold to silver ratio in India was 10 to 1 or 8 to 1. In contrast, in the neighbouring Persia, it was 13 to 1. This value differential would have incentivised the exchange of gold for silver, resulting in an increasing supply of silver in India.

Achaemenid coinage in northwestern India

Coin finds in the Chaman Hazouri hoard in Kabul or the Shaikhan Dehri hoard in Pushkalavati have revealed numerous Achaemenid coins as well as many Greek coins from the 5th and 4th centuries BCE were circulating in the area, at least as far as the Indus during the reign of the Achaemenids, who were in control of the areas as far as Gandhara. In 2007 a small coin hoard was discovered at the site of ancient Pushkalavati (Shaikhan Dehri) in Pakistan. The hoard contained a tetradrachm minted in Athens c. 500/490-485/0 BCE, together with a number of local types as well as silver cast ingots. The Athens coin is the earliest known example of its type to be found so far to the east.

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