2008IEC 60399:2008 Barrel thread for lampholders with shade holder ring
2004IEC 60399:2004 Barrel thread for lampholders with shade holder ring
2002IEC 60399:2002 Standard sheets for barrel thread for E14 and E27 lampholders with shade holder ring
1999IEC 60399/AMD2:1999 Standard sheets for barrel thread for E14 and E27 lampholders with shade holder ring; Amendment 2
1997IEC 60399/AMD1:1997 Standard sheets for barrel thread for E14 and E27 lampholders with shade holder ring; Amendment 1
1972IEC 60399:1972 Standard Sheets for Barrel Thread for E14 and E27 Lampholders with Shade Holder Ring (Edition 1.0)
IEC 60399/AMD2:1999 Standard sheets for barrel thread for E14 and E27 lampholders with shade holder ring; Amendment 2 was changed to IEC 60399:2004 Barrel thread for lampholders with shade holder ring.