Art deco enameled travel clock

One of a kind art deco travel clock with sumptuous enameled dial. Enamel is in Perfect condition.
Works one minute and stop. Need to be serviced but probably nothing broken... just needs cleaning.
French or swiss. Circa 1930.
Very high quality. No visible marks but probably by important Art Deco era clock maker like Cartier, Gubelin, Lacloche, Boucheron... etc.
7cm x 7cm