Check the listing for details. vintage SECO VT GRID CIRCUIT TESTER - Tested & Working - with SOCKET ID CHART. Condition: Used. Listed at 75.00 USD. SECO VT GRID CIRCUIT TESTER FOR TUBE AMP GRIDSMODEL GCT-5TESTED AND FOUND TO BE WORKING WELL SIZE: 6 & 1/2" x. 6 & 1/2". x. 3". OUR TECH CHECKS ALL OUR TEST EQUIPMENT UNITS. IF HE FINDS BAD RESISTORS OR CAPACITORS, HE WILL CHANGE THEM. CONDITION: GOOD WORKING UNIT WITH SOME MODERATE WEAR. SOCKET ID CHART ON THE BACKSIDE. SALE OF THIS UNIT IS RESTRICTED TO THE 48 CONTIGUOUS UNITED STATES no reserve, Great Find!! We specialize in 16 & 35mm equipment & film. The 35mm equipment we handle is generally from the birth of the industry through the mid-1960s. We also deal in 78rpm records & machines. See our me page. Domestic shipping costs include insurance + delivery confirmations. Please complete payment arrangements within 5 days of winning. I cannot combine shipping once original item has been paid. We DO NOT ship international packages as gifts or mark them as -0- value.