Here's the link to Darto detailing the presale...
https://www.dartointernational.com/pre-sale
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The wanted mistake / Pre-sale
Thicker than usual, same price as always
We are happy to announce that from January 18 to 24 we’ll offer our traditional saute pan n.27 with 4mm thickness, instead of 3mm, at the same price (60 USD). This design was born by accident some time ago and we never did it again until now. As we know that many of you could enjoy its benefits we decided to launch this presale worldwide again.
Be aware! Although it’s great preserving heat, it’s also heavier (2.8 kgs / 6.1 lbs). As we don't use to manufacture this special design, it will only be able during this week, not later.
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There's more info on the page. Looks like it won't ship until the end of April.
I'm considering it, knowing my wife will never use this due to it's weight. Finally, a pan of my very own!!!!