This is a very interesting special booklet of coupons for the international service (from the 1930s) between Argentina and Chile, via Mendoza and Los Andes (Expreso Villalonga). There are 12 coupons in all, 6 coupons for the trip from Argentina to Chile (see below) and 6 coupons for the return trip from Chile to Argentina. The companies involved were:
FC Central Argentino: From Rosario to Empalme Rufino (Argentina)
FC de Buenos Aires al Pacifico: From Empalme Rufino to Mendoza (Argentina)
Compania Internacional Transportes Automoviles: From Mendoza to Punta de Vacas (Argentina)
Ferrocarril Transandino Argentino: From Punta de Vacas a Fronteira (Argentina)
Ferrocarril Transandino Chileno: From Fronteira to Los Andes (Chile)
Ferrocarril del Estado: From Los Andes to Santiago o Valparaiso (Chile)