I just pulled the back off my 4x12 last night and found that what I thought were vintage 30s were in fact blackback 25s. I'm just wondering how I can determine the date of manufacture from the stamp on the side of the basket.
Also, is there a way to find out what kind of celestion I've got from that number? I have another speaker that has lost the plastic cover from the magnet, and I know it's a Celestion cause it was in a cab with 2 30s and a 35 and the basket is identical, just don't know what the wattage is.