Help with Promontory/Penultimate/Mascot tasting

Interesting question.  I have all those Mascots, so I will be looking forward to your notes.  With respect to how best to present the wines, I can't say.  I can see why you might want them all revealed vs fully blind.  Perhaps there is way to approximate both approaches.  For instance, perhaps you label the wines as 1a, 1b, 1c (the vintages probably should be in order (from either youngest to oldest or vice versa); 2a, 2b, 2c; 3a,3b, 3c.

i would probably make it a two round tasting depending on how many folks you have

9 bottles, if shared across say 10 people can allow for 2  separate tastings with each person having 2oz pours to taste.

I'd set up the first tasting by doing different labels per vintage.  Then the winner from each of the vintages do a second tasting to vote for the best one.  The first tasting should see if the $ / label matters, the second one should see if it might be possible on a good vintage the label doesnt matter.