This SRS series duplicated some of the numbers used. This record was released as No.35/36, but another record was released (R 3132 by the Teddy Wilson Trio) also as No. 35/36 in Sept 1948. R 3132 was later probably renumbered as No.57/58 of the series. See http://www.concertinas.org.uk/AncientAudio/RS-1947+V1.pdf for listings of the SRS series from 1948 onwards.
McCormack's recordings were issued on the HMV Violet label, which was discontinued sometime after the 1919 annual catalogue, and do not appear in the 1920 catalogue. I have searched all available annual catalogues up to 1920, and this record does not appear in any of them. It looks like this recording was never issued in the UK until 1924 when it was issued on HMV double-sided DA-312. It seems that discographers have probably taken this 4-2374 'face number' on DA-312 and used it to predict an earlier single sided issue. I have sent a PM to one of the 'owners' of this record for further clarification.