Here is where I'm at. Contacted Lippert via phone and spoke to sales rep. She sent me this:
Thank you for contacting Duncan by Lippert. The dot number on the glass of the window will determine the information we need to identify what window you have. Please provide the information below.
KINRO WINDOWS Dot 307, 399, 620, 1054, 1065, 1154 HEHR WINDOWS DOT 269, 322, 383, 399
Hehr windows are obsolete. We can see what we have that comes close to the size that you are needing in a Kinro window option, but you will have to modify the opening a little to make the window fit because the corner radius is slightly smaller than our Hehr windows.
TRIM RING PART NUMBER. If you are standing inside of the motorhome facing the window, then you will see screws all around the window. Unscrew all of the screws and then the trim ring piece will come off and there will be a part number on the other side.
SPEC SHEET FILLED OUT ENTIRELY.
PICTURE OF THE WINDOW FROM INSIDE AND OUTSIDE OF THE UNIT.
Thank you,
Duncan by Lippert
P:800-551-9149 ext. 2550
www.lippert.com
My other passenger egress window on the passenger side is identical. My DOT is 620, therefor I have Kinro windows. When I removed the valance, I saw the window label and did not have to remove the trim ring.
Stay tuned...