Bladelaw:
If you go to the Emerson Gallery post and page down to the pictures section, click onto the 1srt "pic" next to ES1-M. You will see a picture of an ES1-M next to a Commander, with the logos visible. The ES1 has an undated logo, with that "1" you think you see protruding below it, while the Commander has a date that looks like 918, but is in fact 98, bisected by the logo. The observed progression - knives with what looks like a 1, then knives dated "98", then in the next year "99", then this year "2000", make a strong case for assuming the "1" is only a part of the logo.
Ernie used the undated SpecWar logo until he started up EKI (in 98), at which time he started dating all the knives. With the vigor you've shown to expand on your collection, I have no doubt you'll soon acquire an earlier, non-dated custom, and you'll see first hand what the "1" actually is. I just hope its not a piece I'm trying for too!