After a thoroughgoing study of the series, J.-M. Doyen, Economie, monnaie et société à Reims sous l’Empire romain, Bull. Soc. Arch. Champenoise 100 (2007), pp. 63-85, concludes that the series may be attributed to Durocortorum (Reims). For new information concerning particularly the geographical distribution of these coins, the type of sites on which they are found etc., see now P. Beliën, ‘Authorised or tolerated? Some new perspectives on the GERMANVS INDVTILLI L. series’ in J. van Heesch and I. Heeren (eds), Coinage in the Iron Age. Essays in honour of Simone Scheers (London, 2009), pp. 31-51. Beliën stresses rightly (pp. 42-3 and n. 72) that these coins must be considered as semisses, and not as quadrantes (as stated in RPC).