That's got me baffled as well. When you look at the hand, it appears to have a hole in it. Could that represent the wounds in Christ's hands? I don't know if that's a dress or what it is. I can't honestly tell. It looks as if it may be, then again what the heck is it?
OK. I found something for the dressmaker's mannikin emitting radiation. It turns out to be a double-edged sword in the middle, with two curved daggars on either side of it. It's a Sikh symbol. Google Khanda.
In the center, the double edged sword, or khanda, from which the symbol derives its name. The Khanda represents knowledge of divinity and the creative power of God.
Surrounding the khanda is a circular quoit, called a Chakkar (wheel) which symbolizes the unity of God.
On either side, crossed daggers, or kirpans, symbolizing spiritual and temporal (earthly) power in balance.