I sold all my Greenies last Summer, but if the lid off my Red Master-Touch (currently resting on my Performer) will help?
It's a "K" and the # on the vent says PAT.3538906
I have another lid in the shed in a box out in the North 40 I can get the # off tomorrow, if that'll help?
I've never seen any other numbers anywhere else on the grills.