Title
Vacuum tube type 7AK7Catalog Number
102718312Type
Physical objectDescription
Object is a vacuum tube with an 8 pin locking base and a plan carton. "M1" is hand written on side of envelope in green.Date
1938 ca.Manufacturer
Sylvania Electric Products, Inc.Place Manufactured
USIdentifying Numbers
Model number | 7Ak7 | |
Other number | 952 | On side of tube |