... this US promo copy (lower right). The latter was made using the short lived automated "Haeco-CSG" process for mastering compatible mono/stereo (for AM & FM radio distribution) without having to make a dedicated mono mix and pressing ....(cont'd)

(theoretically saving money, but possibly losing if poor sound negatively impacted DJ spins). This sounds wonky. I wonder if there are any US promos without the CSG process?