Hello,

Can anyone please help me date this Swedish Air Force side cap? I know the size is 57 but what does the X mean? Is that a date code? I'm having a hard time dating this cap.

Thanks-Click image for larger version. 

Name:	DSC00031.jpg 
Views:	264 
Size:	226.5 KB 
ID:	457890Click image for larger version. 

Name:	DSC00032.jpg 
Views:	132 
Size:	203.4 KB 
ID:	457891Click image for larger version. 

Name:	DSC00033.jpg 
Views:	83 
Size:	207.7 KB 
ID:	457892