Letter Opener, Standard Steel Propeller Company Promotional Item 1920's (pre-Hamilton) C-46 The pilot can select the

The pilot can select the mode of operation desired by use of the Reset/Stby switch located on the lower right corner of the instrument case

This instrument was used in aircraft with a navigator crewman as an aid to determine the position and course of the aircraft during nighttime flying using celestial navigation

Here is an Annunciator unit

the course correction is calculated and communicated to the pilot

which is aligned to peer through the circular window between his feet

Letter Opener, Standard Steel Propeller Company Promotional Item 1920's (pre-Hamilton) C-46 The pilot can select theHere is a beautifully presented chrome Letter Opener promotional item from the Standard Steel Propeller Company of Pittsburgh, PA. In 1929, Standard Steel Propeller merged with Hamilton Aero Manufacturing, thereafter known as Hamilton Standard. So our assumption is that this item was offered prior to 1929, since the decals on the letter opener state "Standard Steel Propeller" and not "Hamilton Standard" It is in exception condition. The decals are in