Koetsu -- Do all longbodies have platinum/alnico magnets?

Thanks Brock. I always wondered what Alnico meant! I also thought they were synonymous with the Platinum magnets Koetsu uses. Thanks for setting me straight.

Thanks for the details, Mulveling. I am not certain this is true but a reviewer told me that some time ago Koetsu bought every platinum magnet available and stockpiled them. This is supposedly why no other mfg can source them. Seems silly that someone else could not make them, but perhaps tooling and materials are cost prohibitive for small runs.