STENTOR TWO, COSSOR, BALLOON ENVELOPE, TRIODE FROM 1927, 215P
STENTOR TWO, COSSOR, BALLOON ENVELOPE, TRIODE FROM 1927, 215P The Stentor Two was introduced by Cossor in 1927 but was rebranded in 1928 into the 215P. This example is tested and shows good emission and a superb envelope paper label.