While researching something else I ran across some box office numbers for other Tarzan movies in my records.

TARZAN’S GREATEST ADVENTURE (1959)  Rentals $750k, probably $1.5m gross for $12m adjusted.  Likely double that world wide for $24m.

TARZAN GOES TO INDIA (1962) Rentals $1.1m, probably $2.2m gross for $17m adjusted.  $34m world wide.

TARZAN’S THREE CHALLENGES (1963) Rentals $1m, $2m gross for $15m adjusted.  $30 millions world wide.

Not bad numbers at all for that time period.