sc n° 121 (x 11) + sc n°123 (x4) + sc n°155 (x2) + sc n°156 (x2) ,on  air cover from San Jose  V / 15 / 1938  to San Rafael (CA, USA) , V / 18 / 1938 .
 sc 121
sc 123
sc 155
sc 156
air postal rate to USA (rate february 15th 1938) : 50c (first 5g) + 35c (add.5g) x 3 = 155c .
 
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