This trade is the root of the Gary Gaiser (1968) trade tree — the full chain is traced there.
On July 1, 1968, the Buffalo Bills traded the rights to Gary Gaiser to the Denver Broncos for a conditional eighth-round pick in 1969 (#192), which conveyed when Denver drafted James Harris.
On July 1, 1968, Buffalo Bills sent Gary Gaiser to Denver Broncos for a 1969 eighth-round pick (No. 192, became James Harris).