The structures are grey with yellow JBL on the driver. Unfortunately I just have pictures of the amp to move on for a several more times. Thank you - excellent reaction and much appreciated! This Double does not really possess a stamp on the tube graph that would go with the pattern you shown. If you choose your sound a little bit dirtier, or perhaps, looser, the high quality cost of a JBL outfitted black double might not be worthy of it. For some sounds it has been a perfect, like going back again through period to a Memphis saving studio. I experienced a factory JBL outfitted twin for a very short period. Another clue on a later on 60'h loudspeaker might become a tiny N punched into the foil content label. Unfortunately these rubber stamps are not always on the speakers and are usually occasionally on the cupboard, or on the inside of or outdoors of the framework. Product RegistrationĮnclosures and all additional JBL products are called for for two years from day of primary buy. JBL Amplifiers are warranted for three yrs from the date of unique buy. An electronic version of our warranty statement is certainly available.