I posted this question on the wrong forum, Originality/Ground straps in responce to 69x33rs question (What type of radio is this?) and pic of his '69 AM radio.
I'll try this again.
The '69 AM radio in this post has the same service model number-91APB1, and product number-7307311 that mine has. The serial numbers however are quite different- 11PAS-8239 on his and 11PBR-1260 on mine. Is this simply a serial number, a code to tell the difference between single and dual speaker models or just a build date? Have I overlooked a decode list on this site?
9 1969 model year
1 indicates the GM vehicle division: 1 = Chevrolet division. (2=Pontiac, 3=Oldsmobile,
A indicates the vehicle: "A-body". (mid-sized vehicle--Chevelle)
PB indicates the type of audio equipment: PB = AM pushbutton radio. (FP = AM/FM pushbutton, FM = AM/FM-stereo pushbutton, MP = Multiplex adapter, etc)
1 indicates this piece of audio equipment was apart of the first design run. This really isn't that important compared to the rest of the model number. If "2" had been the last digit, it would simply indicate Delco had made a change in the production of the same radio (such as an electronic circuit board revision) and it would have been apart of the second design run.
1969 chevrolet chevelle Am pushbutton 1st design run,(possibly an early 69 car or they only had one design the entire year)
I'm not sure about the serial number,but i dont think it is anything but a serial number.