In 1988 Omega introduced a different version of this reference, 3450808, with open back-bezel. Again the production was of 1000 pieces, numbered. The production was made till 1990, within the serial number range 48240xxx to 48251xxx. The numbering was different, compared to the previous series: we find a “A” before the 4 digits. The movement became yellow, not coppery colored anymore, but still with “Côte de Geneve” finishing. The inscription “ApolloXI” remained. No need to say I’m really fond of this particular reference.. so any other add, info, question, curiosity is welcome...