Bruno & Hancock: Explaining in my own litlle way on How a Panerai Luminor 8 Days Cal P.5000 Watch lasts its Power for 8 Days

How many times have we wished that our hand wound watch will last its power for more than 3 days? Panerai has made a solution to that and not only to last the power reserve for 3 days, but for 8 days! "How did Panerai do it?," you may ask.

I think the simple answer to that question is Innovation. Panerai people have a keen understanding of the basics of a hand wind movement and when they ask themselves, "What if?"

Then, Panerai made two Barrel Drums with thin coiled springs inside and put the two barrel drums in a watch and a Panerai Luminor 8 Days Cal P.5000 Watch was born.

This is how I understand on how the Caliber P.5000 movement works while looking at the picture below. While winding the watch, you are “winding two barrel drums”. While the “main” barrel drum is wind, it also winds the “secondary” barrel drum for power reserve. And when the “main” barrel drum loses power, the “secondary” barrel drum will come to the rescue and will be the one to supply power directly or indirectly to the watch movement. Direct means that it will be the one responsible to supply the power to the movement or indirect means that it will wind the “main” barrel drum so that the “main” barrel will not lose power and will continuously supply power to the watch.

And you may ask another question, "Why 8 days?". I think Panerai Marketing people were very much involved in the making of this watch because 8 connotes Continuity. Please try writing the number 8 by overlapping it with your first writing for 3 times on a piece of paper and you will know what I am trying to say. Thank you!