I tried to post a thread with an attachment but, for some reasons the save of my scan put an EXE tag on it and I couldn't post it. Anyway, I was hoping for some help with one of the few things I managed to keep as a momento of my tour with the Army. It is a pair of binoculars marked 'BINOCULAR M3 6X30' When I look through the binoculars I see two lines, one horizonatal and one vertical intersecting about 1/5 from the right side and 1/5 up from the bottom. On these two lines are a series of markings with numbers assigned to them. For example, looking at the intersection you would see '4' '5' on the marks on the horizontal line just to the right of the intersection. On the horizonatal line, to the left of the intersection are the descending numbers '2' and '1' (assuming the intersection point would be '3'). Following to the left of this is an unnumbered (neutral line) mark downward and then followed to the left with progressing numbers '1' through '5' assigned to the marks. On the vertical line you see a series of marks going up with the numbers '15', '10' and '5' assigned to every five marks. Just below the intersection and horizontal line is the number '20' on a short vertical 'tail' downward. Above the neutral line on the left side of the intersection are two short horizontal lines, one above the other. Over the '5' at the left most side of the are four horizonatal marks one above the other. I am assuming the lines, marks and numbers are used for artillery gunners and sighters or spotters but I'm curious as to how to read them. I have this bewildered thought in my mind every time I look through them. Any help would be appreciated. I realize my description might be vague....but, hope not. Thanks.