  Every link diagram can be represented as a signed ribbon graph. However,
different link diagrams can be represented by the same ribbon graphs. We
determine how checkerboard colourable diagrams of links in real projective
space, and virtual link diagrams, that are represented by the same ribbon
graphs are related to each other. We also find moves that relate the diagrams
of links in real projective space that give rise to (all-A) ribbon graphs with
exactly one vertex.
