Comment by scrough ●:
It's not quite that simple, Han. The December date came from something I'd read, and I forget where now. The
1924 catalogue has some issued by March 1924, and some still as single sided. So perhaps the transfer was completed by/in December. More digging when I get time. But 1924 is the best approximation for all except DQ 102 (May 1928).
Comment by han enderman:
HMV DJ-100 - "In December 1924 the DJ, DK, DL, DM, DO, DQ, DR, and DS double-sided series were introduced containing recordings of various celebrities." (from the
HMV Biography.) - So the date can be corrected. [Done. mod] - The Bolig-Milmo Celebrity Series discography mentions in the Contents the subject of each series. DJ is 10" reissues (general).