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Smallest functional vinyl record

Smallest functional vinyl record
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Who
Unknown
What
6 nanometre(s)
When
26 January 1923
Six titles of 33.3mm 1 5/16 in diameter were recorded on mini vinyl records by HMV's studio at Hayes, Middx on 26 January 1923 for Queen Mary's Dolls' House. Completley functional, some 92,000 of these miniature records were pressed including 35,000 of God Save The King (Bb 2439).