https://emulsive.org/articles/5-frames-on-my-father-in-laws-80-year-old-agfa-billy-record-i-120-format-ei-125-ilford-fp4-plus-by-barry-altman
5 Frames... On my father-in-law's 80 year-old Agfa Billy Record I (120 Format / EI 125 / ILFORD FP4 PLUS)