I am pretty sure most red labels have black diamond k55 cushions. They started using the artemis towards the end and then changed to blue label. RKC can chime in with exact details.
Trent from Toledo
No, we started using the Artemis in 2001 on the 9fts, K55 black on the 7s & 8s. The first blue label 9fts came out in Oct 2010.