There is a guy on the o-addict site that specialised in getting both GEN 1 & 2 models when possible. He's got many : rain, carbon, crystal blue, crystal clear...
When I was completing the Slash's, a seller sent me both Generations of Fingerprint. Sadly I had to send one back since I needed the other colorways and couldn't afford to keep all of them.
From my first Oakley purchase experience, at a surf shop on the Oregon coast, I remember the Heater being one of the options. I went with the Blade at the time, but can vividly remember that Heater lens and thinking it was very Batman-esque or something. I've penned this first purchase as 1991, know it was not 1992, but could have possibly been 1990.
Just some lame ramblings that don't include a picture of Glen.
I would have put the Heater as the 4th M Frame shape (after V, 67, Hybrid) coming out very late 89 or early 90 (before the change to the "Mumbo with Hammers" boxes). I've seen an original Mumbo box with the "HEATER" sticker from a few people. I think Lee showed one in his Spotlight pics, Paul (Flippj) also has some, and I had one myself. The Heater is the only other shape I've seen on the original Mumbo boxes other then the 1st 3 shapes, which is why I would say that it was the 4th shape.
Here's another oddity. Can clearly see that it's a gen 1 with the razor blade nose piece slot. But I've only seen the factory pilot lenses on eyeshades and very few razor blades. My slit lens is one b
I totally was going to bring this one up when I saw the auction on Ebay, then it slipped my mind as I got distracted (stupid work, hahah).
I definitely would sway towards that lens not being original to that frame. The Razor cut nose lenses were stopped way before the introduction of the splatter frames. Presumably, if it was an athlete special, the athlete would have had a prototype splatter frame in 1989, or would have specifically asked for a 1989 gray lens in 1991 or later, both unlikely (especially with so many other cool options on lenses when the splatter frames were out).
I can possibly see a scenario where the athlete originally had a white/black/neon factory pilot pair in 89, then the splatter comes out in 91 and he switches his trusty 89 lens into a new frame. Or maybe way later in time somebody just had the spare parts from different sets and just put them together especially since the nose piece is wrong (it wouldn't be weird to anyone but a collector).
Is it even an original factory pilot lens in the first place though? I would say that if there ever was an M Frame/Mumbo factory pilot lens, it would make sense to have been earlier rather than later. It doesn't get any earlier than those razor nose cut lenses, so it has that going for it. Or it could be as simple as someone having a spare factory pilot decal and putting it on the old V lens cause it looks cool. Probably just have to add one more thing that is lost in time about M Frame/Mumbo, haha.
I was assuming that the lens and frame weren't originally paired. It was the factory pilot aspect that got me. The very early indications of the lens help with some credibility but i had never seen the logo outside the other two models, and i assumed those were.much prior.