Letter from Prevesa 7.12.1867 franked with 9 Kreuzer a strip of 3 to Patras. The letter weight formed the 1st weight step in Austria but the 2nd in Greece because it was higher than 15g and cost 40l. as doubleweight-the weight was between 15 and 17.5gr. The franking with a strip of 3 of 3 Kreuzer is the only known on a 9 Soldi cover.