In English, they're SMURFs.
The instrumentation is actually Chick Corea (el-p, p), Joe Farrell (saxes & fl), Eddie Gomez (b), and Steve Gadd (d).
I like the record. It's nothing earth-shattering, but -- like the title implies -- it's a relaxed, enjoyable session.
Giving this another spin:
Association P.C. - Erna Morena (MPS, 1973)
This band was led by drummer Pierre Courbois, but -- for this listener -- Jasper van 't Hof is the hero of this album.
EDIT:
And here's the other sleeve photo by Jochen Mönch that @soulpope mentioned previously:
Gheorghe,
Muse couldn't compete with the "majors" in terms of paying musicians. (In fact, Tommy Flanagan refused to record for Muse because of Joe Fields' notorious miserliness.) Regardless, the Muse catalog is full of important records by important jazz musicians: Woody Shaw, Pat Martino, Richard Davis, James Moody, Mickey Tucker, Jaki Byard, Sam Jones, Lester Bowie, Hank Jones, "Fathead" Newman, Cedar Walton, Buster Williams, Louis Hayes, Willis Jackson, Roy Brooks, Don Patterson, "Groove" Holmes, Carlos Garnett, Joe Bonner, Clifford Jordan, Mark Murphy, Barry Altschul, and on and on and on.
I think one could make a solid argument that Muse and ECM are the two most vital labels of the 1970s -- in terms of documenting a wide range of jazz artists and styles. Just by virtue of the size of their respective catalogs, those two labels played a huge role in capturing the sounds of those years.