Thank you all for your replies, appreciated. It seems this camera was made in Romania, unknown year (believed to be between 1936 to 1955. I am not at all an expert on cameras, but as far as I know the production of anything smaller than 35mm was unknown in that country, and more so after 1945 when the communists came into power (the sub-35 became illegal, for reasons easily understood). That is why the 127 (or something near this format) sound more logical, at least to me.
Curious thing, this camera. Again, thank you !