I have bought my not purchased through Amazon but at E-Bay De Tomaso San Remo solar watch. Nevertheless, I would like to share my experience with other potential buyers. My old solar clock (Citizen Eco Drive) has given up the ghost, unfortunately after 20 years. As the new clock came I did 3 days (as I knew from my first solar watch) to charge placed on the window sill. Normal charging time is according to the description in cloudy weather 13 hours. When I then took from the window sill and put them ran 3 minutes and then made fat cheeks. She paused. When I held it to the light again, she ran in 2 seconds steps. Once the clock has been removed from the window sill, the same game for 1-2 minutes and end. Of course I was pissed and sezte me with the dealer. He asked if I had since pulled out completely to charge the crown? This is for charging necessary !!! Since I knew nothing of my old clock, could still be found in the operating instructions of the De Tomaso an indication to which this was absolutely necessary, I was obviously not done. So again the whole. This time, only screwed crown, pull it out until the 2nd stop and lay on the windowsill. Now she runs. Conclusion: The clock is Prima The corresponding description is, at best, insufficient. It should be noted before buying !! Better yet, of course, if that would clearly be in the Gebauchsanleitung.