 Pemberton and E.L. Pemberton as "Sefi, Pemberton & Co. Ltd." Together, they donated the Sefi-Pemberton Cup to "The Junior Philatelic Society", now the National Philatelic Society.The firm continued until 1956 when it was acquired by Robson Lowe.Sefi edited the "Philatelic Journal of Great Britain" from 1926, and also "Philatelic World" and "The West-End Philatelist".