Hello Ivo :lol: Sorry I missed your post when I wrote my last reply.
Yes, both of your bowls are Dugan pieces. The first is the Holly & Berry. The second one (which will be somewhat larger) is Dugan's "Ski Star" (the exterior pattern - an intricate geometric - is known as "Compass").
Both are peach opal. It's an interesting colour, as it varies in the same way that marigold does. Of course, it it in fact the same marigold iridescence, but applied to opalescent glass, which is what gives the white edges and high points.
As with marigold, there are different intensities of colour - so there are some peach opal pieces that are deep pumpkin like - and others that are much lighter and softer.