Unknown Japanese Optical Targeting Sight

[harrison987]

Hey guys...

Anyone know what the heck this is?

[beretta1934]

Michael, As you probably already would have guessed - its IJN. The exactly model or Type of cannon it would fit I cannot find. Many different styles and precious little reference materiel - as you know. Mysteries like these are usually only solved when the item comes in a wood case with the tags in place!