Vintage gold filled brooch and earring pairing

These timeless pieces didn't come together, but I think they would look good that way, as well as on their own.. The brooch is just over an inch in diameter, with a symmetrical design of circles, loops and ridges. The little golden balls on the screw back earrings measure just over a half centimeter. The brooch is marked 1/20 12K in two places, and I think there is also a maker's mark - perhaps a B or small G in a circle - but I haven't been able to track it down. The earrings are marked 1/20 12KT Gold filled and also HG, which I believe is for Henry Griffith, a longtime jewelry maker in the U.K. Both are in great shape, with possibly some extremely limited tarnishing on the brooch (really hard to see).