In Kenchreai IV, catalog entry RC 22 is mixed and takes in a variety of sherds with dipinti. As a typological identification, “RC 22e” refers to the hard-fired, white slipped form illustrated on plate 29 of Kenchreai IV. See Slane and Sanders (2005) “Late Roman Horizons” no. 2-17.
“Kenchreai IV RC22e Amphora.” In Kenchreai Archaeological Archive, edited by J.L. Rife and S. Heath. The American Excavations at Kenchreai, 2013-2019. <http://kenchreai.org/typology/p-kenchreai-4-rc-22e>