Signedon back of 2 pair of receivers: RECEIVER / TYPE R-14 / MADE BY / W. J. M. MURDOCK CO. / FOR / SIGNAL CORPS. U.S. ARMY
on back of pair of receivers: NATHANIEL BALDWIN / SALT LAKE CITY, UTAH / PAT. /MAY 10, 1910 / SEP. 14, 1915 / TYPE C
on back of pair of receivers: TRIMM RADIO MFG. CO. / CHICAGO, U.S.A.
on back of pair of receivers: WESTERN ELECTRIC / MADE IN U.S.A. / 528 / PATENT 1273351
on back of pair of receivers: MANUFACTURED / AND SOLD BY THE / BALDWIN RADIO CO. / SALT LAKE CITY, UTAH / UNDER NATHANIEL BALDWIN'S / PAT. / MAY 10, 1910 / SEP. 14, 1915 / TYPE "C"
on back of pair of receivers: PERMOFLUX CORP / PATENT PENDING / PDR-8 / P/O HEADSET / H-3/ARR-3
on back of a receiver: Brandes / Made in USA / Table Talker / Trade mark reg. U.S. Pat. Off.
on back of a receiver: THE SCHMIDT - WILCKES ELECTRIC CO. / NEW YORK, U.S.A. / PATENTS PENDING
on back of a receiver: B / MADE IN U.S.A. / WESTERN ELECTRIC / PATS IN USA 1273351 / 1351143 1583461 / 1631978 / 552W
on back of a receiver on a headset: C. BRANDES INC. / NEW YORK, N.Y. / NHI
on back of a receivers on a headset: (stamped in white) NDRC; (raised lettering) MADE IN U.S.A. / BRUSH / PATENTS PENDING
on back of receivers on 2 headsets: BRUSH / TYPE BJ / MADE IN U.S.A.
on back of receivers on a headset:TRIMM / PROFESSIONAL / TRIMM INC. / LIBERTYVILLE, ILLINOIS / U.S.A.
on back of receivers on 2 headsets: MADE IN U.S.A. / WESTERN ELECTRIC / PAT. IN USA JULY 23 1918 / 509W / 1100
on back of receivers on a headset: NO. 55 / MURDOCK / 1000
on back of receivers on a headset: TYPE TH 37 / TELEPHONICS / CORPORATION / NEW YORK, N.Y. / CTE 49016 / 300-Z
on back of receivers on a headset: (picture of tower) TOWER / MFG. / CORP. / Scientific / NAVY TYPE / BOSTON / MASS / U.S.A.
on back of receivers on a headset: S.G. BROWN LTD / ACTON / LONDON W
on back of 5 receivers in original packaging: Western Electric / USA / (stamped in red) 716-B