3 Jul 2014 The factory, date of manufacture and revision of a particular tube can be B, Mullard, Blackburn, Great Britain. G, Mullard, Fleetwood, Great Britain G – July; H – August; I – September; J – October; K – November; L – December Effectrode pedals to sculpt your own unique and legendary guitar tones.
8 Feb 2012 Celestion design, develop and manufacture premium guitar speakers You can use the chassis date codes to accurately pinpoint the age of the July, G. August, H. September, J. October, K. November, L . Celestion, Unit 111 Claydon Business Park, Great Blakenham, Ipswich, IP6 0NL United Kingdom.
Chronology & Dating - G&L Guitars