Look to be Jag calipers on Rover diff unit.
Oldskoolrob Active Member Jan 5, 2020 #3 FWIW When I wanted to rebuild my calipers, the pots I needed were listed as Jaguar units.
J j_radcliffe Active Member Jan 5, 2020 #4 You can get those calipers as overhauled from the Jaguar supplier, and with a Jaguar price!