- Artist
- Mary Hopkin
- Title
- Knock, Knock Who's There?
- Label
- Apple Records APPLE-26
- Country
- Unknown
- Released
- 1970
- Format
- 7", 45 RPM, Single
- Format notes
- Solid Centre
Runout and matrix codes
Etched or stamped in the dead wax between the last track and the label. If yours match, you have this pressing.
- APPLE 26 ASide A stamped run-out
- APPLE 26 BSide B stamped run-out