Thank you all, you have been very helpful. It is clear that mine are a later 280 type . Perforated in the centre ( not that easy to see in the photo) but definitely no basket weave. Well ... Some surprises due to an not well informed buyer buying ( should have joined the group before) in full confidence from a not very well informed seller. But so far it has proved overall a positive surprise ... no rust, an engine that had been stopped for 8 years was not too expensive to get going again ....the car passed the compulsory roadworthy inspection and now just waiting for number plates to start rolling ! Some of the needed interior work ( mainly dash related wood e dash recovering ..will wait for winter after some new miles on it).
Thank you again.
Pedro