You said:
"I thought the Good Conduct was solid red. Mine was."
Puller was a Marine, not Navy. Solid red Good Conduct ribbons are from the Navy.
found at: http://foxfall.com/gcrm-navy-curr.htm
Establishing Authority
The Navy Good Conduct Medal was established on April 26, 1869, by Secretary of the Navy A.E. Borie. The transitional design of the Navy Good Conduct Medal followed from the original establishment of the Good Conduct Medal by the Secretary of the Navy in 1884.
Effective Dates
The current design of the Navy Good Conduct Medal has been awarded for qualifying service from 1961 to the present.
..snip..
The ribbon to the Navy Good Conduct Medal is red and is based on the red stripe in the original three-colored ribbon; it was darkened to avoid its being confused with the ribbon of the Specially Meritorious Service Medal, 1898, which is a brighter shade of red.
Thanks for the reply and the correction.