Ilkra Edelkeramik J.L. Knödgen (Ransbach-Baumbach, since 1892)
Ilkra produced some great shapes – see its charming jug vases or its ovoid items (such as shape 222, here in decor 'Athens'). My own Ilkra favourites are the delicate, lightweight, wonderfully patterned white-and-grey 207-26 and the green modernist jug vase & bowl combo 2001-25 and 3500-20.
References: H. Makus, 50er Jahre Keramik, p.143, and Keramik der 50er Jahre. Ein Handbuch, p.170-173 and p.414.
Some links: W-G keramiek blogspot Ilkra; Keramiksammlung Ilkra; Fatlava-Schiedam Ilkra