Jackson Tube Tester Model 648

Description

Jackson Tube Tester, Model 648. Also included are three previous reference / data scrolls (Tube Type/Fil. Volts, Circuit D/E, Plate Test), to wit, 648-8, 648-15 and 648-17 as well as a chart entitled “Cross Reference Or Equivalent of Similar Types”
The tester is in clean, physical / cosmetic condition with no signs of excess wear.
The tester has probably been serviced, (most likely by its previous owner who was a serious antique audio and related electronics hobbyist / aficionado / collector / tinkerer) evidenced by the fact that the cover plate has been removed in the past (not all screw holes have a screw in them and some of the extant screws are not original)
When powered on the needle to the meter in the center of the tester immediately moves to its center position.
Please see all pics.
NOTE ABOUT “AS IS” PHILOSOPHY. I sell items such as this tester with the assumption that it is in acceptably good working condition. If that is not the case, I will gladly allow the item to be returned or will make a reasonable adjustment to the purchase price.
In any event, my description and relevant disclosures are made in good faith. Any unforeseen or unknown problems are not intentional.