I have got quite a few bits in Silhouette - a little more dramatic than the other flowery ones.
I believe the manufacturer of this type of plate with the uneven rim is British, possibly Duro-Ray, and this style is also quite reminiscent of the Astra range (p.93) that has been noted with a Made in England label (poss. Duro-Ray). I've also tracked down an example of the Sunburst pattern in yellow. You will often see this rim style on large circular plates (10in dia?) detailing various tourist attractions. I guess they date post-1980, but very hard to say. These are often a single colour, with gilt on the top side.