Buongiorno,
I found, left from my grandfather, an old Panerai. After some research I found that the model is a 6152/1 with cover crown.
The strange fact is that all the 6152/1 I found don't have the device protecting the winding crown. The only one that got it are named Luminor.
I've know idea about the value and where I can ask for some assistance.
Someine of you can help??
Grazie
Luca