These are mostly signified by the "J" series (JA-80p,JB-£1.50 and JC-£2) by Stanley Gibbons catalogues, except for the single 50p booklet which is numbered FB56 and the £1 booklet FH20.
An interesting block of booklets as they are printed by three printers in all - Harrison, Questa and Walsall, and there are many varieties of each.
