Yeah, however R5 was the one one which ever obtained revealed. A minimum of, revealed to the general public as an “R” module (after it obtained revealed as a match module, in manuscript kind).
R6 was revealed as The 384th Incarnation of Bigby’s Tomb: An AD&D journey for a celebration of 5-10 PCs, ranges 15-25 in Polyhedron (Problem 20 – Vol. 4, No. 5). Perhaps. The code R6 beforehand had been used for one more match module. Nevertheless, it is extra related to the module that is really out there (for slightly apparent causes).
R7 – R10 had been solely revealed (so far as I do know) as photocopied manuscripts for conference play – the 4 collectively constituted the ‘Dwarven’ Quest for the Rod of Seven Elements.