18 Watt (SOX-E)
(Turnhout, Belgium)
(Hamilton, Scotland)
(Hamilton, Scotland)
35 Watt
SOX-Plus (Hamilton, Scotland)
SOX-PSG (Hamilton, Scotland)
SOX Plus; date code 9B = February 2019 (Hamilton, Scotland). By the time that this lamp was made, Philips had changed from having the frank printed on the outer bulb glass to a new position on the cap. 2019 was also the final year that the Hamilton factory remained open, owing to the heavily declining popularity of the SOX lamp in favour of LED technology by then. The last day came on the 7th November, ending the 74-year operation of the Hamilton site.
55 Watt
Date code M7 = December 1987 (Hamilton, Scotland)
Date code G8 = July 1988! (Hamilton, Scotland)
Date code 1M = December 1991 - came with the GEC Z9538. (Hamilton, Scotland)
(Hamilton, Scotland)
91 Watt
(Hamilton, Scotland)
135 Watt
Mid-1990s' style. (Hamilton, Scotland)