2 1957 and 1 1958 signed water colors Winnie th Pooh

These 3 water colors appear to be original, not prints. All3 are signed by the artist. Each on is a different picture. They are stamped with the year. All 3 are in what appears to be the original frames. I do not know the value of them. I am hoping one of you out there may have an idea, or can tell me where to look.