Its a bit hard to see yours but i think its a MK1 Airbox. The MK1 has an oval lid. The MK2 has the corner cut off next to the washer bottle.
Here are close ups showing the difference.
MK1 S
Attachment:
MK1 S Airbox.jpg
MK2 S
Attachment:
MK2 S Airbox.jpg
The other type often used is the Clubman GT airbox. It has the corner cut out like the MK2 however the GT airbox is thinner and the lid has reinforcing rings around the wingnut holes.
This pic shows the difference between a GT and MK1 airbox.
Attachment:
Airbox differences. GT Vs MK1 S.JPG