Actually, this could be either a 1988 or a 1989. Inifinity, weightwise, is on par with Tange #2, so it is quite light. The one concession is that it is a seamed tubeset, so theoritically is not as strong as the seamless Tange #2, though I've never seen or heard of one that has falied at the seams. Seamed construction allows for much more economical manufacture. I'd appreciate the serial number for my database. TIA.