timex 100 17 jewel swiss

didn't know this existed even in a ladies model. the back of the case, the dial and the movement all say swiss made. it didn't have a second hand, so i put this little one on to see if it works. keeps time very well, thank you. any info on this movement would be greatly appreciated. i thought only the 400 series had 17 jewels, and this doesn't look like the 400 17j i've seen. thanks, tim