large porcelain NUDE clock (French?)

Hi, new to the post wish someone would of told me earlier about it . So I pick and collect many things and most recently I can a cross this large Blue Porcelain clock. Its almost 16 inches wide and 17 inches tall and has the cracked look to it . It has four different pictures of nude women on the front in different poses. On the inside on the back is a number 1742 on it and on the pendulum there is a 618 stamped on it. Don't want to take it a part to try to find the maker or any other info because it works great! Any Idea on the time frame, maker, or anything about it would be much appreciated, was told it was french but don't know. Thanks for any info or help you might have!