Hi! I have a model A combo with 2-12s(128GSP), two channel,reverb,hi boost,distortion,3-way mid freq select,4-12ak7's and 2-6550's,serial #50332. Can anyone enlighten me on the year it was made,what wattage and rough estimate of value? It has the wheat colored vertical rectangles for the grill cover. Scottstut@aol.com thank you