I got this off eBay a while ago, I think it might be from a rangefinder of some kind. Does anyone recognize it or have any information on it? I would be grateful for any help in sizing components to build it a PFN.Click image for larger version. 

Name:	DSC_0722.JPG 
Views:	0 
Size:	4.93 MB 
ID:	58674Click image for larger version. 

Name:	DSC_0723.JPG 
Views:	0 
Size:	4.78 MB 
ID:	58675Click image for larger version. 

Name:	DSC_0729.JPG 
Views:	1 
Size:	4.95 MB 
ID:	58676Click image for larger version. 

Name:	DSC_0724.jpg 
Views:	0 
Size:	987.6 KB 
ID:	58677Click image for larger version. 

Name:	DSC_0727.JPG 
Views:	0 
Size:	4.66 MB 
ID:	58678