Based on the back of the button, it appears to be manufactured after the 1980s. Please refer to the images of the button back, tab, zipper, and the label that came with the purchase to make your own judgment. Since there is limited information, I'm not sure of the specifics, but the 646 in colored denim, even if it's a reproduction, might be quite rare. There is some slight blackening on both hems, but I've only worn it a few times after purchasing it as deadstock, so in my amateur opinion, the condition is quite good. Please check the images. I am 173cm tall and weigh 63kg. It fits me perfectly without being too tight, and the hem just barely grazes the ground with regular boots, so I wore heeled boots. 【Size (measured flat)】 Waist: 33 inches (84cm) Rise: 28cm Inseam: 78cm 【Flare Width (measured flat)】 27cm The size is listed as M, but since these are amateur measurements, please be sure to confirm all widths and lengths before purchasing. The age, size, and condition are based on my amateur assessment, so please understand that these are used clothes before purchasing. Model Number: 600s Model Name: 646 Features: Big E