Fostoria Corporation Model DSV Viewer

I have recently come into possession of a Fostoria Corporation Model DSV Viewer, that also has an overhead reticulating lamp, as well as a magnifier attachment. I'm trying to determine it's worth but I have been unable to find another like it online. I only was able to find an announcement of it's creation in an archive of american-dyestuff-reporter. The item and all its bulbs are in full working condition.  The lamp appears to be attached to the lighbox, which can be raised. Below is the full text from the archive: May 16, 1960 e American Dyestuff Reporter DSV Viewer DSV Viewer An illuminated 3-D magnifying viewer for close tasks or viewing re- quiring bright lighting and full-view magnification has been developed by Fostoria Corporation. The new view- er, known as Model DSV, features a 6” x 6” optically ground acrylic lens that provides full three-dimensional perception. Two four-watt fluores- cent tubes highlight the working area, and a soft diffused underlight- ing is provided by two _ recessed eight-watt fluorescents under the viewing table base. Underlighting and overhead light may be positioned separately by means of friction col- lar disc joints. The table also can be adjusted to lie flat or slant. Magni- fication provided by the 6” x 6” lens is said to have good resolution and high visual acuity. It is claimed that, since eyestrain and posture fatigue, experienced with undersize magni- fiers, are minimized, speed and accu- racy are improved. The model DSV viewer is supplied without lamps in silver-grey finish. For more infor- mation, write Fostoria Corporation, Dept 32, Fostoria, Ohio.