1978 Topps Zest
Topps produced for Procter & Gamble's Zest brand soap a set of five cards featuring Hispanic baseball stars as a promotional item. With the exception of the Willie Montanez card (#4), the front of the cards are identical to the 1978 Topps set. The backs of these cards are bilingual (printed in both English & Spanish). The entire 5-card set was issued via a mail-in promotion (to Zest soap) and was not issued with the actual product.
This set is tough to find, but due to the player selection, not all that expensive.
1 Joaquin Andujar
2 Bert Campaneris
3 Ed Figueroa
4 Willie Montanez (different photo)
5 Manny Mota