From what I heard..(from a good source)..amber coating was on ver 1..but people complained about the high contrast and cool color.....then coating was changed to purple which slightly reduced the high contrast and cooler color..
Next came revised amber on ver 2..but this time the contrast was lowered and color warmed up even more. This probably remained the same to ver 3..even though some say it was further tweaked along the way.
But probably LLL are the only people that know exactly the timeline of all of this as there seems to be all kinds of lenses out there with different coatings and glass in them.
I noticed right away from the early LLL release photos that the Leitz was warmer w/more shadow detail and less vignetting, but didnt know what coating (amber or purple) was used on the LLL prototype test lens.
I guess everyone will have to figure this out for themselves, but at least as of now..the current ver 2 & 3 lenses w/amber..are lower contrast and warmer..which may be a good or a bad thing depending on which kind of look you need.
Perhaps for the folks that wanted the multicoated versions that never appeared..the 1st ver in amber or purple would be the best choice. But maybe a VC would be even better.
Just checked DHL..
My lens is in Cincinnati OH..it cleared customs..and will be here on the 22nd.