I think it's worth tracking down. When playing near the West-end, it lasted from 1969-1971 (I think), which is likely the longest a TKB musical has run, seeing as they've made 44. The most recent post on that Facebook page starts with a track from The Golden Bat (https://www.facebook.com/YUKKAHIGASHI/videos/352944928399382/). Maybe I'm overhyping it.