Jaguar V12 Diff ratio 3.07:1

I purchased this diff for a project approx 15 years ago for $500.00. The diff was then taken to a European Jag specialist and was checked over etc at a cost of a $1000.00 . I know longer have the receipt. I remember it wasn’t a LSD. The Ratio is 3.07:1. according to the tag 43/14 = 3.07.1 The docket attached to the diff indicates no oil. One bolt needs replacing as it’s bent.