Long tail Jag gearbox

Can anyone help me identify this gearbox ?
It’s a long tailshaft GBxxx gearbox, missing central stabilizer pad, with shift knob going straight up, no quirky shifter mechanism/cover. Very early Mk1 ? But why different shifter location ?

Yes, pretty sure that is a Mk 1. They had a different top cover to the other cars. That said, it is missing the square pad on the top of the bellhousing to mount the rear engine stabiliser, which I think the Mk1 had. Maybe it has had a different bellhousing fitted, but the gearlever setup certainly looks like Mk1. Very early Mk1’s had a strange cranked lever, but this looks like the normal one.