Sweet pop, bro! The Cinese character on the bottom says "Lei" which means storm in a very cartoony style. The second sets of characters says "Beautiful women like jade." I don't think they are worth much though.
[[SPOILER]] Not an expert but I'd say 60's because of all the deetz you've mentioned plus I would like to point out the single stitched cuffs. My type 1 repro has single stitched cuffs, too. Which means they've followed all the vintage denim jackets' details. So, either this is a repro, which I doubt it, it was made to specs.