According to the Chris Craft Essentials Manual, page 605, you have a 1969, 46 foot, Riviera, hull # 2003. In 1969 (4) hulls were built under the RAB prefix, # 2001 thru 2004.
For some reason, in 1968 and 1969, both the RAA and RAB prefix was used, in addition to the RAP, and RAQ prefix.
I have a 1962, 44 foot Riviera that also has the prefix RAB.
Hope this helps.