For USA Mono Argo Pressings the "Black Label" versions are the earliest pressings, The "Black Label" versions usually have an offset trip changer deadwax spiral. The Mono Argo "Grey Labels" are the 2nd pressing of which are the most common all of the USA Mono Argo LP variations. It was issued one time in 1958 on Argo in Stereo (USA) from the multi channel tape [r=2071363] and has a Dark Blue Label. Two re-pressings do exist with "Black Label" from 1959 [r=4473096] & [r=8880893] but have a different back panel that indicates the release of 1959 [m=214242] at the bottom of the cover.
