The above note is now demonstrably misleading or wrong because ALL 78s were SHELLAC apart from TRC 24 & TRC 23. What is odd is that LATER when the label changed from WMA to TOPIC RECORDS, TRC 23 was reissued on Shellac. So I'm going to be quite dogmatic here, there were only ever two 78rpm records issued on vinyl! These were both issued in round about 1949 and the 'Deccalite' material was available at the end of the war so it is not incompatible with a vinyl 'unbreakable' disc being issued in 1949.
On a huge number of these 78 releases there are errors in the spelling of people's names (and titles). Ewan suffered from constant misspelling of his own name by the printers or the people at the WMA who didn't check how to spell it. Margaret Barry had her name spelled "Barrie" on her Topic 78 release and Al Jeffery is variously spelled Al Jefferey, Al Jeffrey and the correct way. Brian Daly had his name spelled variously Daly and Daley and Brian and Bryan.
Advertised on 78rpm, March/April, 1958: Pete Seeger, Peggy Seeger, Jack Elliott, The Weavers ... Above 78s back to TRC85 1955-58. TRC1 - 14: 1939-41.
Hand-written dates on Topic data sent by Tony Engle reads as follows: TRC 92...Jan., 1956; TRC 98...same; TRC 101...May 1956