This balloon was built in 1984 by the Dutch Limburg-based factory Price Balloons, founded by T. Price and A. Kurvers. It was destined for Pelgrim, a manufacturer of heaters and kitchen appliances. In 1984 registration PH-BAM was reserved for it as "Price AX7-77S" c/n 002, but it was never officially registered as such. Then in 1986 registration G-BMZT was reserved for it, but it is not listed on the G-INFO website because it too was never taken up. Despite not being legally registered anywhere, the balloon made several flights in the mid and late 1980s. The Air-Britain book "British Civil Aircraft Registers 1919-1999" also lists it as "Price AX7-77S" c/n 002, without a registration date. Note that it's marked as "BAM" instead of "PH-BAM".