The quiver in the first part of the post is for a left hander or the photograph is reversed.
I think the majority of these quivers in museums are for court ceremonies and are not usable quivers for horse archery. I have examined the one in the Grayson Collection several times and the arrows, darts, arrow guide and bow are not made for use. There are many paintings in Korea of officials in processions and at court with bows and arrows in this type of quiver.
They are clearly related to the Manchu quivers used in the Qing Dynasty of China. However, the ones I have seen close up rarely have the complex three strap suspension of the Qing original.
I did see one quiver with two felt pads inserted into the mouth as spacers. The Manchu used a similar system in their quivers. A felt pad was folded across its middle and inserted in the opening of the quiver. It was sewn in place at either end by thin leather strips. Two screws were inserted from the outside face of the quiver through the pad and out the inside face. Nuts were used to tighten them on the inside face (the side against the archer's body).
I made a scaled down version of a Manchu quiver and bow case to see if it would work with a Korean bow and arrows.
The image isn't appearing but you can see it here
http://picasaweb.google.com/bededw/Quiv … 3222217106