Two Large Art Pottery Vases, signed Niffenegger

Two large stoneware vessels with engraved and polychrome glazed circular cartouches featuring hybrid man/animal creatures, one signed and dated "Niffenegger 1977" to underside, the other signed and dated "1978 ©" to base.

Tallest 21 x 19 1/2 x 7 1/4 in.

The taller with some firing hairlines to base; the shorter with a few minor surface marks to body.