It appears Steve's instructions on this reservation tips page are out of date? You can book a reservation for the Duomo climb through the official website. However, it doesn't say how to book your reservation if you have the Firenze Pass and not just the six site, 15 Euro, Duomo card. Has anyone tried booking a reservation with the Firenze pass?
I hate timed entrances but don't really need the Firenze pass on this trip to Florence. Unfortunately not getting the pass means timed entry at the Duomo and Uffizi. :(
Also, if the monument closes at 18:20 what time do you suppose the last entry will be and will it be enough to get to the top. I suppose giving myself 1.5 hrs should be enough to climb, enjoy and descend?