I've two pieces of this and they are so different... one is a small oval posy vase (the sort of thing I always think of as inexpensive gift/tourist ware) and the other is a pair of snuggling bunnies. Both are marked but with different versions of the mark.
Joseph Szeiler was apparently a Hungarian who came to England in 1948, intending to become a coal miner, but that wasn't to be, and he began working in the pottery industry for Meakin's, before moving to Goldscheider Pottery, and then onto Wade Heath, and finally Richards Tiles, before starting his own Studio Szeiler. Joseph specialised in animals, but also made money boxes, vases & dishes, and those jolly kitchen storage pots looking like a pig's head, etc... In 1987, the year after Joseph's death, his factory was sold and is now Moorland Pottery.
There is website about Szeiler Pottery, which is still being put together, but they already have some info online...
http://www.szeilerpages.justbrowsing.com/ in case anyone wants to know more. (Added to Links also.)