Old moulds

These are some old molds that I found. I do not know what they were made for. They seem rather large and heavy, as much as ten pounds each, to be molds for wax or chocolate. Each appears to be signed and some dated. They may be aluminum or zinc or some other metal. Nothing similar anywhere on auction sites. The outside of the molds are blocks and do not reflect the image shown inside.The lower left corner is half of a swan and the block above it is a different angle of the other side of the block. On the right side is a three piece mold of a dove. The keys seem to have been manufactured differently but all have more of an industrial look. I do have others, including an eight pound mold of a victorian woman. Any information to understand what these are would be appreciated.