Agree
You can get pukka 296 filters from Rochester City Diesel on The Delce (assuming you are in Medway) only a few pence more than pattern filters and containing so much more filter paper...
Can't you give us a sensibly-sized photo?
From the postage-stamp I can see, it looks like the filter is clamped between the head and some kind of bowl, so probably a CAV type.
Pete