In 1968 only, Airstream added a stainless steel trim to the edges of their frameless windows. The same model of windows were used in 1966 and 1967, but the trim was not used in those years. The trim is not structural so we don't call it a frame. We suspect the addition of the trim around the edge of the glass was either to make open windows more visible to passers by, or it was to reduce the UV damage to the rubber gasket otherwise sitting unshaded under the glass.
Regardless of the reason for the change, 1968 Airstreams are easy to identify from this feature. To allow for a faithful restoration, we have reproduced the 1968 trim in quality 304 stainless steel to replacement fit glass or Plexiglas that is 1/8" thick.
The trim strips come in 32" lengths with square cut ends. You will need 2 strips to complete a small 17" wide window and 3 strips for medium and large windows. We recommend having your seams at the glass clips on the bottom edge of the glass. Measure your glass to determine exactly how many strips you need for your project.
Like the original, this material is quite thin. It is 30 gauge (.0125"), so it can easily be cut with a thin Dremel cutoff wheel or some snips. You'll need to cut it to length and miter the two lower corners.
The trim is attached to the glass with a small amount of clear silicone caulk as an adhesive.
Please note this item will arrive with light tool marks from the stamping process. The scratches can be removed with Scotchbrite and then polished to your desired finish.