Would Citroen really have had variations on the housings? Between ID or DS? Or BVH and BVM? I always thought the gearboxes are all interchangeable…. Always learning…
Indeed they did.
Skp's shows the early attempt at RHD, where the required bosses were in the LHD position, so they fabricated a mirror version.
Certainly the rough cut out section is because of the boss for the 7 piston pump, as found on DS19 and optional (with power steering) on the ID19 after Sept '62. So the pic shows pre '62 RHD clutch setup, with after '62 box.
It is possible that this came from Aussie assembly during the introduction of the second front, where they may have had some left over components.
More likely it's a later gearbox replacement.
Sven's pic shows the second version, and you can see that they were then casting a lug for RHD cable outer end, as well as the 7 piston pump mount. This casting would also have the LHD cable lug, but it would not be machined (faced and threaded, and slotted).
I have all the parts available for Skp, in both versions...... but we should confirm the year of his car, as i suspect he should be looking for the later one, not the one he showed.
Maybe he has an early box that does not have the RHD cable lug.