This is a confusing release. The cover gives the release number as RRMW 158, but the label reads RRMW 258. RRMW 258 has the same tracks, but a different jacket. And despite what the Discogs entry and the Bluegrass Discography state, the labels are copyright 1973, NOT 1967. This is confirmed by both of my copies, which I have in-hand.

RRMW-258 are overdubs of RRMW-158.... Rural Rhythm dubbed additional instruments onto the original 1966 mono recordings to create a stereo effect. 258 was released in 1973, and 158 was discontinued 3 years later..... In this particular instance, someone got the 1967 jacket mixed-up with the 1973 album. I am removing the pictures of the album because they are not the right album.

I would guess that the release RRMW 258 is Stereo (as noted on the label in the picture) and RRMW 158 is the Mono version. I have RRMW 158 and the jacket and labels both state that same catalogue number.