Engine Oil bath air filter - which type on a '67 1500

Hi all,

I have a November '67 1500, this is a 68 model year with the upright headlamps.

The engine has the circular type oil bath air filter fitted to the 30/31 Solex carb. Is this the correct on for the year / engine type ? (looks like the early 70's 1200 one).

I have a feeling that it should be the larger oval type for this model, but I'm really not sure. A steer on this from someone who knows would be really useful.

If this isn't the correct one will it cause me any problems?

Thanks in advance

Andy:):)