I'm not sure the shifters will work with a triple, but they are the microshift type similar to what I have on my Roberts, and that has a Campag Racing Triple chain set. The left shifter will do at least 8 clicks.
It's possible a few folk may remember my wife and myself from the recent jumble at Kedington, Suffolk, we were the pair with the isolated table outside selling all manner of stuff I needed to clear out. A few days after we got home I realised that I had a box of good quality Campag components...