20 CENTAVOS DOUBLE FOREIGN LETTER RATE   COBAN to GUATEMALA CITY Two pieces of 20 centavos issue combined with 2c for 42c seven times multiple rate, maximum weight of 105 grams (15 grams per 6 centavos). tied with partial purple octagonal “COBAN” postmark. Backstamped “RECIBIDA / GUATEMALA / FE_  26 1897”.