▁Number ed ▁Minor ▁Plan ets ▁( 4 3 5 0 0 1 ) – ( 4 4 0 0 0 0 ) ▁( IA U ▁Minor ▁Planet ▁Center ) ▁▁ 0 4 3 5 <0x0A> </s> ▁" Watch ▁Out ▁for ▁Lucy " ▁is ▁the ▁B - side ▁of ▁the ▁single ▁" Prom ises " ▁released ▁by ▁the ▁British ▁rock ▁music ian ▁Eric ▁Cla pton ▁in ▁September ▁ 1 9 7 8 ▁of ▁his ▁studio ▁album ▁Back less . ▁ ▁Com position , ▁release ▁and ▁success ▁The ▁song ' s ▁lyr ics ▁and ▁music ▁were ▁written ▁by ▁Eric ▁Cla pton ▁himself . ▁The ▁song ▁features ▁a ▁fast ▁ch ord ▁pro gression ▁in ▁minor ▁and ▁major ▁as ▁well ▁as ▁dimin ished ▁ch ords . ▁The ▁title ▁is ▁in ▁the ▁key ▁of ▁G ▁major . ▁ ▁EDIT : ▁song ▁is ▁in ▁A . ▁R iff ▁pro gression ▁is ▁A ▁- C # 7 , ▁F # m ▁- ▁D ▁ ▁( I - III , ▁vi - IV ) ▁ ▁No ▁dimin ished ▁ch ords ▁the ▁III ▁ch ords ▁is ▁a ▁secondary ▁dominant , ▁V 7 ▁of ▁vi ) ▁ ▁Song ▁could ▁be ▁played ▁in ▁G , ▁cap o ▁ 2 nd ▁f ret , ▁then ▁the ▁r iff ▁pro gression ▁is ▁G ▁- ▁B 7 , ▁Em ▁- C ) ▁Record ▁producer ▁G lyn ▁Joh ns ▁worked ▁with ▁Cla pton ▁during ▁the ▁recording ▁sessions . ▁The ▁song ▁was ▁released ▁in ▁September ▁ 1 9 7 8 ▁as ▁the ▁B - Side ▁of ▁" Prom ises