Larry, Below is a pic I snapped from a 1929-46 Chevrolet Master Parts Price List with what appears to be the complete door handle assembly from keys to lock. In comparing your picture to the diagram, I see the following items that might be missing from your set:

Pawl, Door Lock Outside Handle (19/64 x 5/32 x 19/32 long) 16.380 (GM# 601199) - fits 1934-42 ALL vehicles

Screw - Washer, outside handle 16.353 (Screw 1/4-28 x 17/32 clutch fillister head w/shoulder - chrome - GM# 3654594 and Washer 11/16 I.D. x 5/8 O.D. x 1/32-nickel plated - GM# 4240198) - fits 1931-46 ALL vehicles *

Pin, Door Lock Outside Handle (secures lock and shaft into handle) 16.387 (GM# 4047769) - fits 1937-46 ALL **

* Yours may be there and already threaded into the end of the shaft, but I can't confirm from your picture???
** Yours may be already inserted into the Shaft 16.385 as I see what looks like the nub of a pin sticking out the side of the shaft???

Hope this info is helpful.
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~ Dan
1951 Chevy 3 window 3100
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