Thank you for viewing. Vixen Telescope Dark Field Guide Adapter GA-2/GA-3. It has been several years since purchase. There are no noticeable scratches or stains, and it is in good condition, but I no longer have the opportunity to use it. Because the mercury battery H-2D (2.7v) is missing (dead battery), I have substituted two alkaline button batteries 625GH as shown in image (11), and have only confirmed that it powers on. Images (12-13) *It is unknown if the above battery substitution is correct. *The batteries are not thick enough; please use them with some modification. Please refer to the images, confirm, and understand before purchasing as a set of 2. *Everything in the images will be included. *This is an old item, so please refrain from making claims or returns after purchase.