Well, I was in Africa at the time, but when anyone brought me albums from the States they were mono. I have a mono Sgt. Peppers, Magical Mystery Tour, Parsley Sage Rosemary and Thyme, Leo Wright Blues Shout,Charles Bell and the Contemporary Jazz Quartet, Slide Hampton's Sister Salvation, Ruth Brown, etc. and I have in the last decades bought lots of mono records from the second half of the sixties so I just think it's not unusual that Contrasts was released in mono.