Can someone help me find which type of crown was on this vintage Girard Perregaux Sea Hawk?
Here is a picture of the movement
From what I have been able to find out, the dial is similar to Gyromatic of the 1970s. I have not been able to find picture of a Sea Hawk with similar dial.
I managed to order a replacement stem. Before trying to find a crown I'd like to know if the crown was having GP sign or not when this one was made by GP.