Van der Graaf Generator’s “Theme One” from 1972 was released as CB175. However, it does have BCP 6 crossed out in the deadwax on both sides. So, it was obviously intended to be BCP.6 but for some reason was released as CB 175 instead. Early issues feature the rare picture sleeve, below. Now, just have to find what happened to BCP4 and 5! I would imagine something similar happened…