This is a case I used recently with my Canon VI-L rangefinder. I am pretty sure it will also fit the Canon P and a few similar Canon models with the rapid advance lever. The condition is exceptionally nice - most of these encountered today are pretty run-out. I've set a very reasonable price for such a hard to find item.
To my amazement this case fits my Canon IIF2 (essentially the same body as a II or III) so the answer is yes. It is a little oversized for the bottom loading Canon's, but the locking screw holds it in well and there's lot of room for lenses.
This is a case I used recently with my Canon VI-L rangefinder. I am pretty sure it will also fit the Canon P and a few similar Canon models with the rapid advance lever. The condition is exceptionally nice - most of these encountered today are pretty run-out. I've set a very reasonable price for such a hard to find item.