Okay, first, let's get the name correct...
In the press release to dealers, and in the April, 1969 Camaro ordering information packet, the NK1 wheel is referred to as "Cushioned-Rim." It was never called "Comfort-Grip." The "Comfot-Grip" name may have been incorrectly skewed from the tilt steering column option which was available at the time "Comfort-Tilt".
Anyway... The NK1 option information was released around April, 1969. Ordering information shows that it's the same black 15" wheel used for the 1969 Corvette. Since the information was released in April, the earliest build date for a car ordered with one would probably be May, possibly later.
Now the problem... When Chevrolet released option production number totals for the 1969 Camaro, the NK1 option was shown as "0". While there are tons of '69s around with this wheel, no documented paperwork that I know of (window stickers, shipper copies, invoices, etc...) shows the NK1. Therefore there aren't any "factory" installations known to exist. However, as this wheel was in production for the Corvette and other GM Models at the time (Buick Skylark for one), it's VERY feasable that these wheels would be "dealer" installed. Anything to make a sale, right?
So most First Generation Camaro "experts" believe that the NK1 Cushion-Rim steering wheel never actually saw the light of day in a "factory" configuration.
Let the debate begin...
Ed