Dutch beakers in the shape of glasses are extremely rare. J.W. Frederiks mentions two Dutch 'rummer' beakers, one also marked Utrecht with date-letter of 1614 and struck with a maker's mark, shield with two chevrons. This Utrecht silver 'Berkemeijer' seems to be the first recorded in the Netherlands. Cf. J.W. Frederiks, Dutch Silver, The Hague, 1958, 1960, Vol. II, p. 138, no. 406, pl. 186 and Vol. III, pp. 16, no. 46, pl. 33.