Are those graphs from Soundstage's web site ? If so, I think they have M2 / M3 / M22 / M40 / M80 but no M60...

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8