Thank you, it was where you said it would be.The serial # I found is 0028680,Sticker says it's a X2303 Quad Loop,With a 60" cutting deck.What service manual should I buy?Some of the older models have it stamped into the frame where the back of the seat rest on the cross bar. There could be a strip of foam backed tape over it. It usually on the right side of the cross bar. But could be on the left side as well. If it is there invert the first two numbers and that is the year it was built. Some models have a small white sticker on the cross bar where the front of the seat hinges.