A440 Posted April 19, 2016 Share Posted April 19, 2016 CLEANING OUT OLD MEMORIES AND THIS POPPED UP GIBSON GA-15 RVT SERIAL # A018742 (ON CHASSIS). ORIGINAL SPEAKER THAT I STILL HAVE WAS UPGRADED PROFESSIONALLY BY REQUEST OF THE NEXT GENERATION (MY SON) WHODABELIEVE!! ANY HELP OR DIRECTION WOULD BE APPRECIATED PRICING OR DATING .... I HAVE FOUND NO DATING SYSTEM ON-LINE. I AM TAKING THE AMP TO SELL AT THE ELMIRA GUITAR SHOW ON APRIL 24 AND I'M TRYING TO GET ALL PERTINENT INFO PRIOR TO ...... THANKS ALL A440 my-music@bell.net Quote Link to comment Share on other sites More sharing options...
badbluesplayer Posted April 20, 2016 Share Posted April 20, 2016 There are date codes on the transformers. That's the best way to tell when it was built. If you look at the xfmrs there will be a couple of lines of codes like the one below from a 1959 Gibsonette. The bottom line is the manufacturer and date code. The last 3 digits is the date code. The first 3 are the manufacturer's code. So the pic below shows the manufacturer code, 549, which is for Midwest Coil & Xfmr, and the date code, 941, which means that the xfmr was made in the 41st week of the year ending in 9 (1959). If you know when the xfmrs were made, then you can tell that the amp was made shortly after that. So the amp is probably from late 1959 or so. So look at the transformers and see what the codes are. If you post them here, we'll figure them out. Quote Link to comment Share on other sites More sharing options...
Cam in alberta Posted April 20, 2016 Share Posted April 20, 2016 supposed to be similar numbers on the speakers. Went to look at mine 62 & 63 the one with original speaker had no numbers or was painted over. Google gibsons garage - amps. good info there www.0rigami.com/gg/amps.html Quote Link to comment Share on other sites More sharing options...
Sheri Posted September 13, 2021 Share Posted September 13, 2021 I am trying to figure out the year a Gibson Explorer GA-15 RVT was made. It says Kalamazoo, Michigan. under the knob labeled Fuse there is a number- A019206 on the speaker there is a number- 5810028 is this enough info to figure out what I need to know. I’m trying to sell it and I have no idea what it is worth. When I plug it in it turns on and I found a glass tube inside. Thanks for any help you can give me. Sheri Hageman rshageman@msn.com Quote Link to comment Share on other sites More sharing options...
Grog Posted September 17, 2021 Share Posted September 17, 2021 If it has black tolex covering & silver grill cloth it is likely from the middle sixties. This was the last series of amps built at the Gibson factory in Kalamazoo. Quote Link to comment Share on other sites More sharing options...
Cam in alberta Posted September 19, 2021 Share Posted September 19, 2021 brown tolex 63 -64 black tolex silver cloth 65-66 67-68 were the thor ones with vertical flat sides Quote Link to comment Share on other sites More sharing options...
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