Release date from booklet 'The New Singles' No. 515
A release date of 22 Mar 1974 is given in booklet 'The New Singles' No. 517
A release date of 14 Jun 1974 is given in booklet 'The New Singles' No. 529
An utterly ridiculous choice of songs for a single for this time. The A side is charming but doesn't really work or belong to this era... with singles like this, it's little wonder the RCA era is not held in high regard. The B side is one of the very worst songs of the era. Difficult to listen to at 33 1/3 rpm, let alone 45.
The A-side is actually the original demo version of "Mirror Of Love", with Ray Davies playing nearly all instruments (apart from mandolin which was left to Dave Davies, and brass contributions), the same that was eventually used on the Preservation Act 2 album.
A second version of "Mirror Of Love", recorded in a full band version in June 1974, was pressed in the UK and released on 26 July 26, 1974 on RCA LPBO 5042, the same version as used for the US single release.
Apparently, not many people in the UK did notice either of them at all.