Rose: Coquille has been a very popular design, which you can tell by the number of companies who developed similar lines, including Lorraine from Montreal. Few, if any, of the other companies achieved quite the same quality and purity as Flygsfors. The early ones, of which you have one, are more desirable than the later ones. The little bowls like yours are fairly common on eBay and sell from $40-$100+, roughly, depending on size and colours. The vases, which are much bigger, go for quite a lot more.
Kedelv left to work for Reijmyre, where he worked until 1977, when he was 60. I don't know what happened after that, but none of the book I've got note his death.