November 3 & 4, 2026 Online Only Firearms
The live portion of this session begins on Wednesday, November 4, 2026.
Lot #2396:
US WWII SPERRY K-13 COMPENSATING GUNSIGHT
World War II K-13 Compensating Gunsight made by Sperry. manufacturer's plate is present and reads "Sperry Gyroscope Co., Inc., Brooklyn, N.Y., K-13 Compensating Sight, Part 659060, Ser. 26934, Cont. AC 3571." A pneumatically-powered gunsight designed to compensate for altitude and airspeed. Late war innovation that used the aircraft altitude and speed with the direct correlation of where the weapon was pointed to calculate the reticle. The aircraft altitude and speed were programmed on the rear of the sight. Mounted on the rear housing of a .50 cal machine gun from a waist gun position. The correlation was determined by drive lines that connected the K-13 Sight to the K-7 Mount. Appears complete. CONDITION: Good.
Item Dimensions: 7" x 10" x 4"