I just want to give you correct infos about my 450D and let you know that I only have one in blue color.
I was about to buy the other ones but the seller changed his mind and I was never able to buy the grey and the orange.
That was back in 2010
I did import this bike personally with a batch of other vintage bikes.
Its a 1968 four speed with frame number CB4501016878 engine number CB450E-1014685, currently unrestored.