The package arrived in the Canary Islands (Spain) in 30 days. It came in a clear bag apart and well assembled and subject. The nut mechanism is fully adjustable to any watch, I tested it and at first I was able to open the housing without any major problem, I stand perfectly and the result was excellent. Good purchase, recommended if you need to change the batteries yourself for little money. It should be noted that watchmakers often charge enough for this service that one can do in case same.