An example of similar form and size, also dated 1713, from the Glaisher Collection in the Fitzwilliam Museum, bears the initials 'IE' and 'Wrotham'. It is believed that this latter example may have come from Ightham, near Wrotham in Kent. A hitherto unrecorded example dated 1711, bearing the same potter's initials and medallions, was sold Christie's, London, 19 November 1968, lot 12.
For further detailed discussions of this group of globular tygs and illustrations of two examples, both dated 1701 and initialled 'IE', see L.B. Grigsby, The Longridge Collection of English Slipware and Delftware, vol. 1, London, cat. nos. S.53, S.54.