What the term means
Rare singles, regional labels, picture sleeves and promotional 45s. The term should be supported by label, catalog, matrix, packaging and provenance evidence rather than seller enthusiasm.
Identification checks
- Picture sleeve and record should be graded separately.
- Center holes, adapters and label wear matter.
- Regional hits can be scarce.
Condition and market
Compare equivalent copies with the same pressing type, country, completeness and condition. A rare format can still have limited demand, and a later pressing can sometimes outperform an original because of sound, packaging or availability.