A guy posted a video of his kettle today on the Facebook site Weber Kettle Fans. The caption read: "How old is your kettle, mine is 23".
After over 45 comments from individuals, he changed the caption to: "How old is your kettle, mine is 60".
Not a very good quality photo of the lid vent but I can make out Wood Dale on it. Appears to be a 22"Traveler"

But wait, it gets better. Buried in the comments of this thread, this is what another guy posted.

Says it was his grandfathers and he knows what he's got. He identified it as a 1964 Ambassador.