Thank You Fumihiko Sugano and Koetsu

What I found, in the platinum stones, was a richness and "filled in" quality to the bass, aside from what has been called a "technicolor" midrange. I don't find that in my system, which tends to be lean. It looked like the "writing was on the wall" with mulveling 's original post. I have two stones and will use them, face the question of replacing the diamond and getting them refurbished when I have to. 

End of an era. I know there are other flavors but these meshed beautifully with my system and gave it a verisimilitude it lacked. 

Well, I just picked up Koetsu Rosewood Signature Platinum as probably my first and only purchase from Koetsu’s fine line of carts. 

Because the Brand Koetsu has ceased, does not yet mean the members of the Family have stopped caring for the Brand.

There is the strong possibility a aftersales service is to be offered from a competent member of the Family.

They might also become a Patron of the Legacy and be quite valuable as a resource to prove a Fake has been produced, this in not strange in the World of Art for deceased painters who have died less than a 100 years past. 

Koetsu has a extremely broad customer base, I am sure there are quite a few who would fully understand and welcome the Families extension of support for both Service Requirements and Authentication.

Certificates could be supplied by the Koetsu Family to explain the trueness to Original Spec' following Servicing / Overhaul, which in its own right as a Koetsu Supplied Document will prove provenance. 

As this Brands Products are likely to substantially ascend in value over the next few years, such a practice will make it much much harder for the Fakers, as any purchase could be carried out pending Koetsu supplying Provenance or proving  Provence Cert' is an authentic document. 

@pindac You know something about this, or are you just speculating? What makes you think there's a "strong possibility"?

It is a speculation , but one based on the idea, a Support Service carried out as a Business by a Family Member is one that is very different to running a Manufacture and Marketing Business, maintenance does not come with a Timeline from supply of item to return of goods. Maintenance will be attractive if undertaken by an Indivicual/ Individuals with inherent knowledge. 

There is also the strong possibility the Koetsu Brand Name is sold and the/ier are clauses that restrict the Family from becoming competitors in the field of equivalent product types for sale.

It would be very difficult to have a clause that would Stop a Family Member offering a service that was a Third Party Cart' rebuild Service for any Cart's sent from all Brands.