70s vintage Japan stoneware mugs w/ woodpeckers, birds in pine tree rustic natural woodland print

Set of four vintage stoneware mugs with red headed woodpeckers - these aren't signed or marked at all that I could see. Probably made in Japan, I think. All are nice and clean without staining or discoloration. One has a hairline crack, so it would be decorative only. I'm including it for you anyway because it's handy to have if you display your vintage mugs on a rack or a mug tree, even if you just grab the mug or two in front over and over!