This article appeared in the Autumn 1973 (Issue #33) edition of the Kent Archaeological Review.
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Gallo-Belgic stater found on the Medway Marshes.
In the Spring of 1967, during field work by the Upchurch Archaeological Research Group on the Medway Marshes a very fine gold coin was found, lying on the surface of the mud, at site 005. See Footnote  It was submitted to Mr E W Tilley of Gravesend Historical Society who identified it as a Gallo-Belgic stater and provided the following description:
Gold, Gaulish stater of a type commonly found in Kent (Gallo-Belgic C, Allen). See Footnote 
Gaulish Atrebates Mack 26. See Footnote 
Obverse: Portions of laureate head of Apollo to right
Reverse: Crude (stylized) disjointed horse to right, pellets and curved ornaments above and below.
Date: Circa 100-70 B.C.
Weight: 98.59 grains.
Specific gravity: 14.89.
Estimated composition determined by X-ray analysis: See Footnote  70-80% gold, 10-20% silver, approx. 5% copper.
Traces of silicon, calcium and chlorine. Silicon coming from the clay mould used in the manufacture of the coin See Footnote  and the calcium and chlorine from the sea water that covers the site twice daily.
In Belgic Gaul the find spots of this type are concentrated in the Pas-de-Calais area and the Somme valley, the territory of the Atrebate tribe who were centred at Arras . See Footnote 
The presence in Britain of Gallo-Belgic C, found mainly in central Kent, is thought to be due to the primary invasions of the Belgic tribes into the country and the distribution pattern of the find spots show the direction of tribal movement and settlement. See Footnote  The subsequent coin types struck in Britain (Brit A-K) being derived from Gallo-Belgic C. See Footnote 
Of the thirteen other find spots in Kent twelve have produced single specimens of this type, the exception being at Higham, near Gravesend, where eleven were found in a hollow flint. See Footnote  The Upchurch specimen is the only recorded Gallo-Belgic coin from the Medway marshes at Upchurch and is also the earliest of the pre-Roman coins that have been recorded from various parts of the marshes. See Footnote  These are all British types and using Allen's classification they are:
1 bronze L x 26 (North Thames group) Circa 45-20 BC (Allen considers that this this is incorrectly identified and is more likely Ly 6 (South Thames group). See Footnote 
2 Potin coins, class 1 type L? See Footnote  Circa 50 BC-50 AD.
2 Bronze Kentish inscribed dynastic coins of Eppillus. circa 10-20 AD.
The coin has been deposited in Maidstone Museum.