Someone who has info about this PG Optical Dividing Head Modell no 711
Click image for larger version. 

Name:	DSCF0100.JPG 
Views:	139 
Size:	156.8 KB 
ID:	26066
Click image for larger version. 

Name:	DSCF0101.JPG 
Views:	138 
Size:	155.8 KB 
ID:	26067
Click image for larger version. 

Name:	DSCF0102.JPG 
Views:	138 
Size:	157.8 KB 
ID:	26068
Click image for larger version. 

Name:	DSCF0103.JPG 
Views:	135 
Size:	154.5 KB 
ID:	26069