F2a POWER Tube Siemens 4 pieces Never Used NOS


F2a POWER Tube Siemens 4 pieces Never Used NOS
 _gsrx_vers_1516 (GS 9.3 (1516))







 _gsrx_vers_1652 (GS 9.7.4 (1652))







 _gsrx_vers_1653 (GS 9.7.5 (1653))