When examining
the Marathon for original movement the words "Harley RONDA SA"
will be visible through the battery hatch. The exact movement
type has not been verified.
Case appears to be the same case used for the Adanac Navigator.
Case back inscription: GALLET AND CO./ 6645-01-150-8115/ 211/
DLA400-90-C-5144/ FEBR. 1991