You’ve got 2 different levers there…
The linear lever a the bottom is proper old, Part of the original Sport system when they only did on brake!
Looks to be open tho, not closed.
The Top lever which pulls back on to the bar is a Pro 2, open system again.
Open had no adjustment (apart from lever position) and the Closed had a dial in order to adjust the contact point as well… however they didnt like heat!
Calipers look like Mini’s, too small to be original O2’s,C2’s.
Bit of a mash up of parts tho!
The top lever used to run the Enduro 4’s and M4’s before they went over to the Mini lever.