You are bidding for 1 piece rare 5557 thyratron tube from RCA. Tube was tested on Funke W19 like rectifier with result of 120mA. Overall condition is fine. Check actual photos for details.

 Private selling. I’ll prepare good package and post worldwide, but will not assuming responsibility for tube damage during postage due age and gently specific. Payment should be done within 3 days. Bid accordingly with posted above. 

Contact seller for any questions. Check my other power tube auctions. Happy bidding. Don't loose opportunity.