Hi helmut-pl,
Yup, the comments made up to this point are right-on. It's a 30th Anniversary Japan market only model. As the Japanese brochure reveals, there were only a 100 of these made including a few Adamas in the line-up. A friend of mine owns one that was involved in a bit of a mishap. Several years ago, I was able to have the Mother Ship repair it, and hand-carry her back to Japan. She really is a beauty and a dream to play...

Ebony fingerbaord and walnut bridge with the signature feather logo. The sound board is AAA Sitka Spruce with just the right amount of bling!

She comes with the OP-X pre-amp, and sounds incredible with or without an amp.

Just amazing craftsmanship from the folks at New Hartford.

Back in the day, the price was 300,000 JPY which translated to about $3,000. Valued today, that would be like 700,000 JPY or $7,000 street. About equivalent to what the Japanese stores are asking for the 50th Anniversary models.

The price you show in the German auction seems a bit high, but then with shipping and customs costs, I'd have no way of really knowing. These guitars are rare even in Japan, and never come up for auction. I had the opportunity to play my friends' while it was in my possession (about 1-week). After, I carried it back from one of my business trips (thanks to John Budny for arranging the repairs in time for the hand-carry back to Japan!), I returned her to my buddy, who put away his Martin upon the NNS778's safe return. I had withdrawals for several days after returning her.

Sorry about the long winded response, but I hope this helps!