I think it's because of the size and the stripy cushions that its reminds me of a Jongert that was listed with Berthon a few years ago.
I think the asking price was less than £1M - it was a lovely boat and about 80' but steel - but the full PDF boasted of the work it has had done in the last few years. I think there had been one "minor" refit and another "major" one, and also something else that had run to hundreds of thousands of pounds - the total was about £3M, I think.
Seems like if you have the money to keep an 80' or 90' one, it's hardly worth buying it secondhand.