Graduated bezel, or 304, Smooth bezel.
Of course, the first Mare is from 1943 ( if my memory serves me well ) and existed only as a proto, housing an Angélus movement. The case was 52 mm big, and the PAM 300 is a trustful re edition.
Then, in 1997, you had the PAM 6, 7, and 8 Mare, with the Blue, White and Black dials.
The Pre V Mare and the PAM 6, 7 and 8 had a 42 mm case.
Best,
Nicolas