I just spent a hundred dollars on a new SC64W HI to replace the lost SC60W...and am less than impressed. It is smaller, MUCH more "dainty" feeling, and the "upgraded" output specs seem no better than the old one (without having a direct comparison.)
If someone says "I got one...for $200 it's your's" I would hem and haw...and then pay up.
I tried to find info on past models, but it isn't readily available. Got a pic? Is the UI H1/H2, M1/M2, L1/L2?
After using my new one awhile, i was WAY OFF in my initial statements. The SC64w HI beam is indeed vastly superior in brightness...but gets too hot to hold within 30 seconds or so. And after figuring out the programming to achieve the lowest low, that is now satisfactory. Besides the distasteful feel of the exterior, the only remaining dislike is the UI...a few inadvertent clicks and it's easy to change things you don't want to, and i certainly won't carry the instructions in my pocket forever. The original UI of H1/H2, M1/M2, L1/L2 is perfect for me.
In summary, my initial emotional outburst of dealing with loss, combined with its replacement simply being different, has been tempered enormously. While I still want to buy the old model again, the desperation is gone.
Now that I think about what I know of Zebralight history, I don't think what I have is what you're looking for. I think what I have is a H60W. It's a headlight. I might have that one 52 flashlight one that takes a single AA, but I don't think the UI works right on that one (possibly because I never used it every day).