easy you just take the number of people that buy in on it divide that buy the number of days in a year, calculate the tavel distance for shipping from one person to the next. then pool money together for the shipping, dont't forget the insurance and an insurance agent that will insrue it any where in the world. (after all it is solid gold even if the lenses get scrached you might be watching ebay a while for a replecment pair.) and you have the number of day in the year that we each can keep it in our repective colections.
as for the time of the year i guess that can be decided like you do at work for you holiday seinor person gets first dibs and then it goes down the ranks.
if we use this theroy we should all get the glasses for 22 hours a year and i am looking for the some time in january.