The Signature Series was a program where an artist would design a model, and then the Stone Co employees painted them. Each model had a stylized sticker of the artists' signature, and came with a Certificate of Ownership.
Bed Bug is a dark bay tobiano ISH. This one is the non-custom version. Designed by D'Arry Jone Frank. Only 250 were produced, including both custom and non-custom versions. Unknown how many of each were made.