You probably are not aware that the umbrella case designs are different for each of the Diamond Jubilee and Collector’s Series models.  The blue Diamond Jubilee features a silver trimmed case and lined leather grain.  The gold Diamond Jubilee has coordinating gold case trim and pebble leather grain.  The 1979 Collector’s Series features silver case trim and patent leather graining.  The umbrellas for all three cars are are black with silver metal trim pieces.