There are and were only 3 part numbers ever for Sphere series speedos:

- #80500 Sphere (original version, >5.5t motor limit)
- #80700 Sphere Competition
- #80750 Sphere Competition TC-Spec

So, the "2007 Edition" of the Sphere Competition is also a #80700. I would assume there are no previous model Sphere Competition in hobbyshops anymore, since the "2007 Edition" started shipping end of 2006 already.

You can recognise the version by a white additional sticker on the front of the packaging which says "2007 Edition".