thanks for the hard knock...yeh, you guys are right--it's apparently an early 70's sg deluxe...I bought it in 76' for $365...at the time I had no appreciation for it's age-related value...I was too caught up in it's sound and how easily it played...it wasn't until 83' that I began to wonder about it's age...gibson's kalamazoo office said it was made in 64', but they were basing their info strictly on the six-digit ser #--which, according to the blue-book, does indicate 64' as the date of manufacture...problem is, gibson did quite a bit of ser# duplicating prior to 77'...as duely noted thru-out this thread, the bridge, block inlay, and headstock clearly indicate early 70's (I should have known that all those performers I saw in the 70's were using "new" guitars)...the clincher is the "made in usa" indent-marking under the ser#...apparently gibson used this indent on very few guitars prior to 71'...oh well, so my git got "ten years after" today...kind of a shock at first and I must admit that I feel kinda dumb that it took me so long to realize it's from the early 70's, but what the hell, it still kicks ass...