NISMO S14 (RHD) Door Gauge Holder

[ki_JDM_ds]

I bought this recently and was wondering if anyone else has info or has pics of one. What gauge would likely go in it and how much they are worth.

There is a tab on the back that seems to be sheered of how would I mount this?

http://i33.photobucket.com/albums/d78/ki_JDM_ds/ZWhip/DSC_0027-1.jpg

http://i33.photobucket.com/albums/d78/ki_JDM_ds/ZWhip/DSC_0028-1.jpg

http://i33.photobucket.com/albums/d78/ki_JDM_ds/ZWhip/DSC_0029-1.jpg

http://i33.photobucket.com/albums/d78/ki_JDM_ds/ZWhip/DSC_0031-1.jpg