I've seen both colour and monochromatic covers for at least two, the most recent being the "blue" version of the Anacleto cover you added to Spawnworld. Both copies of the Anacleto cover that I have (#45 & #51/100) are full colour.
You also have a monochromatic version of the JG Jones cover (with the red stamp still there), but my copy of the JG Jones cover (#57/100) is full colour.
We can only assume that there are multiple versions of the Anacleto and Portacio versions as well, no?
I don't know if there were two of each or not. I spoke about them with Brian Haberlin a while back and he said that they intentionally printed museum edition comics "sometimes" in blue or red ink.
I guess I hadn't really realized my JG Jones cover was one until you just pointed it out! Ugh...that means I shouldn't have passed on the color one...
Based on his "sometimes" comment, I don't think we can assume that they exist for each comic, but it's certainly a possibility (and in what number is anyone's guess).
If you wouldn't mind sending a scan of the JG Jones color version please, I'll get it added to the site.
