Mixing: Penny Lane

Studio One. EMI Studios, London

A copy of master mono mx RM11 of Penny Lane had been sent to Capitol Records on January 23rd for American pressing. But Paul felt it could be bettered, so three more mono mixes were made between 6:30 and 8:30 this evening, the new master being RM14. The main difference between this and RM11 was the omission of some David Mason trumpet figures from the very end of the song. A copy of RM14 was made for America between 9:00 and 10:00 pm. While it was not too late to substitute new for old in Britain, however, a few singles using RM11 had already been pressed and distributed to US radio stations as advance promotion/broadcast copies - although for the commercial release Capitol used the correct mix.

The single, "Strawberry Fields Forever/Penny Lane" was issued in Britain on Friday, February 17th, the Beatles' third double-A sided 45 in four releases, and both songs thus dropped out of the running for the album currently in the making.

Source: The Complete Beatles Chronicle - Mark Lewisohn