Its not a breeder or seedbank, clone only strains are only available as clones. Mostly they are special selected phenotypes of a commercial strain, or old classics who was keeped by someone somewhere...

Swiss Clone Only, became also famous in the netherlands. The ICE is a selected pheno out of a Skunk Special X White Widow cross, back in 1996. She was selected out of 500 females, because she had best of both sides. The enormous buds of the Skunk Special, the rich coverage and power of the White Widow, with an Indica look.During the High times Cup of 1998, the highest THC-levels were measured in the ICE. (published in Weed World).