Proto Socket Sets

Image Description: 

Socket Set 5400D - 1/2" Drive - 3/8' to 1 1/4"

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Image 2 Description: 

Socket Set 7400D - "Power Socket Set" - Included 6 6pt. 1/2" drive sockets (unsure of sizes) - Referenced in 1966 Catalog Price List.

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Comments

7400D contents: 6 each 1/2" dr. 6-pt SAE sockets 1/2", 9/16", 5/8", 11/16", 3/4", 13/16"

see Ebay item 222059151811 listed 03/19/16