Morris Minor Owners Club

How would I work out if the speedo is original on my Traveller? I know there are various little numbers on it - do any of them indicate when it would have been manufactured?
The only distinctive thing about mine is the central area has thin white concentric circles. it's a 1967 F Reg. My parents had a 1970 J reg and that definitely didn't have the same circles. [frame][/frame]

It is the same as the one on my 1965 two door, which I know to be original to the car. I think that later ones had kilometres marked on an inner circle.

There's some useful speedo identification info here: http://potteries.mmoc.org.uk/Identify.htm

Exactly the same as on my 1965 4 Door, including the white rings, but I have no way of knowing if I have an original speedo!

for 1967 that would be ok without the kph on it

Thanks all for replies. I will trust I've got an original speedo. I've got records for my car going back to early 1990s but its first owner (1967-92) didn't appear to keep anything.