Used condition; may have wear and age related marks. See pics for condition / what’s included / testing conducted. Webster Instruments FT 5173-1 Power Pack for TH2A Tachometer Head Vintage Webster Instruments FT 5173-1 power pack supplied with the photographed Webster tachometer head. The original label states POWER PACK for TH2A TACHOMETER and identifies Webster Instruments, Cambridge, England. Exact public resale evidence is scarce. Condition: Used industrial surplus item with possible age, storage and cosmetic wear. Untested unless explicitly stated; see photographs for exact condition and included parts. Please match the exact photographed part number/model/revision/connectors to your application before purchase. Includes x1 FT 5173-1 power pack and x1 Webster tachometer head as photographed.