I can't read Chinese chop marks, but do have a bowl like your yin/yang one that I got from David Wang store in Lt Bourke St Melb in about 1970 - the sole survivor of a set of 6 different bowls. The crazing was there from when new. I recall one had a dragon & another a fish theme.
My set of 6 originally came satin lined boxed with a wooden chopstick set for 6 & a pair of grey Tang? horses - also showing crazing like that in your pics. I suppose they were for decor as Chinese food was just becoming popular in suburbia back then for themed dinner parties.
