Best of The Best 12au7

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sta

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Best of The Best 12au7
« on: 13 Apr 2011, 10:53 am »
Has anybody heard or got one of these?  They were assessed best of the best at a tube rolling party.   
I am curious how the sound compares to the Mullard Longplate D-Getter from the 1955 to 1957 time period:

- Gold Monarch B749
- Lorenz welded plate circle getter 12AU7 (even with sub-standard readings!)
- Mullard 10M gold pins 12AU7
- Telefunken ECC802S factory certified version
- Cossor wrinkle glass long welded plate square getter double support
- Siemens chrome plater double getter support ECC82
- Marconi toast plate square getter wrinkle glass B329 (Mullard made)