Do you know what mould was used on this cake??
There isn't an image to look at. Try reposting please :)
Nope! Doesn't work
I don't know about the bottom border--it's a bit hard to see.
As for the flowers, they look like a hydrangea cutter (the 4 petal flower) and various other flower cutters that have been detailed with a tool and/or overpiped with royal icing.
Which part? There's several things going on on that cake.
If you are talking about the different flowers all over the cake it looks like all types of cutters used. Ben Isreal does that on one of his cakes but runs a piece of lace and fondant through the past machine to imprint. Here's the link if you're interested.