So I've just picked up some crowns and amongst them are these scallop crowns.
As some of the other crowns are the thin decagonal Constellation 4204's I was hopeful that these may be the scallop 4205's and also correct for the 143** series of Constellation references....but now I'm not so sure as after reading through this and a couple of other threads think they are too small.
Mine measure around 4.5mm diameter and 2.65 max height compared to the dimensions I find for the 4205 of 4.85mm diameter and 2,95mm height.
Does anybody have an idea what they are for?