The charcoal grate is for the cubes.. I think we all agree on that.
Weber made some grills with the 3 wheeler vents that need to be installed by the end user. Nuts and bolts, not rivets. I don't get that thought process by Weber. Anyone?
I also know, cause I have a NIB. It has wood handles as well. Not sure of the year, I will try to get it out by the end of the weekend.
I am thinking late 80's or early 90's. I am fairly sure that the OT's were produced at the same time as the 3 wheeled vented ones. Most likely the One Touch came out first on the higher end grills and then eventually became the standard. Look at all your MT's and Performers.. Just my 2 sense..