The age is 90s, indicated by the three digits on the back of the button. The production country is faintly marked as "Made in USA" on the inner tag. The brand is clearly Levi's on the pocket lining, confirming that it's a 90s American-made Reverse Weave. The inner tag was fading, so I wrote the production country and model number with a marker so I wouldn't forget, intending to wear them for a long time. The fading model number on the inner tag looks like 550, but the details are unknown. I think it's probably 550. Size: M, 31-32 Zip: YKK USA45 Flat measurement: Waist around 40cm, Rise around 29cm, Inseam around 76cm, Thigh around 32cm, Hem around 21cm. There may be some errors due to amateur measurements.