Signal Electric Mfg. Co.
Menominee, Michigan, USA
Signal Electric Mfg. Co. 1941 Brochure (2-page PDF)
(Click on the pictures to see additional images.)
Listed as early as 1920, a circa 1950 Signal Electric catalog describes these next 3 keys like this: This model represents the finest in key design. Built to the most exacting engineering specifications. The rugged and sturdy all brass construction of this key has made it a particularly popular model with shipboard operators. Fine balance and accurate adjustments. For the operator who wants the very best. Comes equipped with navy type plastic knob. Furnished with 3/16, 1/4 or 3/8 inch finest coin silver contacts.
Signal Electric R-62
3/16 inch (4.8mm) contacts.
0079
Signal Electric R-63
1/4 inch (6.4mm) contacts.
0080
Signal Electric R-64
3/8 inch (9.5mm) contacts.
0095
Signal Electric R-48
A wireless key described from the earliest Signal Electric catalogs right up through 1950. The price in 1920 and 1941 was $2.80. By 1950, it was up to $3.65
0141