It is a popular plant in the UK, and is sold mainly by (
www.plantsofdistinction.co.uk and gives a little info about its history, and if I remember rightly it is not derived fom a brandywine type even though it is billed as a brandywine shape and originated somewhere in the region of sweden or skandinavia or belgium .
This firm is a very good supplier and I have dealt with them on many occassions.
They dont send out any seed each year before about the second week in january each new season. average turn around- about ten to fifteen days. all posted in bubble pack envelopes.