7-pin EF Johnson Number 122-227-200 Ceramic Chassis mount NOS (JOHNSON 227) stamped on bottom of socket - hard to see
different production batches, bottom of sockets stamped different
(2) phosphor bronze contacts silver plated
(6) bronze contacts, not sure if silver plated - have pins tarnished (or pins are tarnished nickel plated)
(for 1625 power tube)