Zeppelins are more dieselpunk them steampunk, since first of them flew in 1900 and their "gold years" are 1917-1931.
ZR-1 "Shenandoah" Zeppelin over St. Louis.

Graf Zeppelin over Kozle.

Zeppelin over Zurich.

Zeppelin docking on Empire State Building.

Graf Zeppelin in 1931r.