I am beside myself, I wandered into a second hand shop the other day, and there in the display cabinet, all neglected was a E710-H24105TA in pristine condition. I had only just learnt about the existence of Eco-Drives, having just discovered Seiko Solars, thinking what a cool idea. OMG, not only was this an Eco-Drive but a PerpetualCalendar as well. When I got it home I researched for hours trying to date the Watch from the SerialNumber which is 9D0980, all I could determine with my limited knowledge was that, either 1999 or 2009. Can anyone tell me when these were available and what year mine is. Thanks guys.