We’ve discussed oil filters frequently on this forum.
Here’s an example.
You appear to have a standard XK140 filter, with an anomaly.
FA2690 used on early XK140 G1001-G1907 normally would not have the external bypass valve,
which I see yours has.
FA2690/101 used on later XK140 G1908-G6232 is the same but with the bypass valve. So it may be that you have your original filter but the wrong tag.
Here is a 150 filter.
So my recommendation is to find out if that small hole in the block has or does not have the plug as pictured by Mike, and do you have two or three big holes.
Here is block G4686
