Eterna "clamshell"

In these days I happened to "save" some watches, not in good condition but which, IMO, deserved a second chance.
It happened with a Tissot (presented here https://omegaforums.net/threads/do-you-like-tissot-many-pics.58233/page-22#post-1979991) and with this Eterna clamshell.

This also needs good service, but the starting point is good enough



The logo and some of the graphics are faded but still legible



The typical screwed caseback



The dial takes on different shades depending on the light



It is basically the same case used by Tavannes / Cyma

Ooooops, I got the wrong forum, can someone move the thread in "Other watch brands"?

Is that a Twist-O-Flex band on the Tavannes? I remember when they were so cool.

It's a Ristmaster Made in USA