sathomasga
·I happened to come across this one on eBay. I assume the idea is to rotate the inner bezel so the first day of the month aligns with the appropriate day of the week, and then you can match the day and date for any other day in the month. At first the photos confused me, but I think that's because the first of the month has been aligned with the second Friday in the top ring. If the first of the month were aligned with the first Friday in that ring, everything would line up properly. Or, at least, that's my hypothesis.