It looks like some sort of N.V.S.I movement from ca. 1935. The exact specification will depend on size, e.g. a 13''' movement (ca. 30mm across) would be a Cal. 13''' N.V.S.I (later designation 13'''-2 where the -2 denotes a savonette or "hunter" movement).
Information about The N.V.S.I initials completing the number of lines of the caliber in question refer to the first (I.) version of the New variant of this caliber, adaptable to Lepine watches (or “open-face” watches, showing the dial and its glass (“Verre” in French) directly), as well as to Hunter (“Savonnette”) watches.nobody knows what's behind NVSI acronym, at least that's what's written in the Rossler's book
they are in house for sure