No luck either, maybe heritage seeds from membership of distribution list such as Cottage Garden Society or Hardy Plant Soc.
According to the Catholic herald March 1953
"The early cabbage Velocity can be sown about now, to give fresh, tender green for those who like their cabbages raw. eaten as lettuce. It is particularly sweet, crisp, eating."
Golden acre 62 days seeds widely available http://smallfarmersjournal.com/cabbage/
refers to Early Jersey Wakefield which matures in 64 days. Found seeds on am&zonhttp://harvesttotable.com/2009/02/quick ... ble_varie/
also refers to Early Jersey and Golden acre, also Charmant (52 days); Earliana (60 days); & Ruby Ball (70).