Jack Kirby: Double Life of Private Strong #2 - August 1959

Per GCD both Simon and Kirby on pencils.

Aug. 1959: Double Life of Private Strong #2

Jack Kirby: Double Life of Private Strong #1 - June 1959

Per the GCD entry:

"Kirby penciled the border art and possibly the background figures with Simon likely drawing Private Strong."

https://www.comics.org/issue/15044/

June 1959: Double Life of Private Strong