I am having problems verifying that this bike I am looking at buying is actually a 70's Raleigh Professional as advertised. The pictures aren't to good, but you can see the serial number doesn't appear to be in a Raleigh format. The seat cluster appears similar to the 1977 version, however it comes with Campy Record 5 speed components. It should be 6 speed if it was made after Raleigh went to that seat cluster. Can anyone shed any light on this?