This CD was supposed to be the Mono cut, but for technical reasons didn't achieve this.
Trk 1: Stereo - the 2'42 short stereo version. The longer 2'52 version with alternate guitar at the fade-out is on the Stereo A Quick One CD. There is a true Mono version at 2'30 and was last released in 1974 on the double LP on Track Records of A Quick One (Mono) and Sell Out (Stereo), and various bootlegs, notably "The Who `66" on the Polyboy label. Otherwise, the Mono version has never been released officially on CD.
Trx 2-10: all are Mono
Extra Tracks
Trk 11: Batman (long version) - fake Stereo
Trk 12: Bucket T - Mono
Trk 13: Barbara Ann - Mono
Trk 14: Disguises - 14/6/66 Mix, 6 seconds shorter than stereo - Mono
Trk 15: Doctor, Doctor - Mono
Trk 16: I've Been Away - Stereo (Mono version is otherwise only available on 7" vinyl as the B-side to Happy Jack)
Trk 17: In The City - Mono
Trk 18: Happy Jack - 1st acoustic mix with cello - Mono
Trk 19: Man With The Money - Stereo (no Mono mix ever released)
Trk 20: My Generation/Land Of Hope And Glory - Stereo (no Mono mix ever released)
tracks 01-10 = the original 12/1966 album, reaction lp 593002 (mono), 594002 (stereo) ;
tracks 11-20 = bonus tracks including 11-14: four of the the five-track 11/1966 reaction ep 592001, "ready steady who"; single b-sides; alternate takes; recording session outtakes.
all tracks produced by kit lambert; original lp, singles & ep released on the robert stigwood organisation's reaction label, as kit lambert's & chris stamp's track records was not yet up and running, and the who had not completely escaped from their first contract with shel talmy, who'd obtained their signing to merkin decca (see the tale told by the who's singles through this period, on 45cat.com).
the merkin decca & the canadadian decca versions of the album were retitled "happy jack" both to tie in with the single, and because the merkin manglement objected to the double entendre of the original title; on them, the track "heatwave" was dropped, replaced by "happy jack" appended to side one.
remixed and remastered for cd by andy macpherson & jon astley at revolution studios