Anyone ever seen these strings!!??

[Jon Moody]

GHS was marketing their own "Boomers" in the late seventies; I know because my guitar player loved them. Did they do that while they were also making strings for other companies?

Of course. We do that now, as does anyone else that offers private label strings.

 

[Linnin]

Just realized those gauges on the package in the photo are identical to the Brite Flats M3075 set, 49-62-84-108.

Ah Ha! Good sleuthing @michael_t

 

[compulsiveslap]

those are the funkiest gauges I've seen. that alone should narrow it down..