A1 and B2 recorded at the Beatfarm, London, and A2 and B1 recorded at Doi-Oing Laboratories, London.
The track times listed on the rear sleeve are all incorrect. The sleeve lists them as:
A1 (6:27), A2 (4:52), B1 (6:31), B2 (5:49)
The correct track lengths are listed below.
Etched into runout of Side-A: 'W' 'W' 'W' FOR WHITE ONES
Etched into runout of Side-B: 'W' FOR WHITE CHECK