1871, very rare returned registered letter with 3 x 1 Gr. perforated on complete folded letter cover from Katowice 14.4. (71) to Lubiaz / post Oswiecim, red jagged edge boxed handstamp of one line "registered" and reverse arrival Oswiecim, delivery not possible, returned with again placed red registered boxed handstamp of one line and reverse railway mail transit "Wroclaw - Katowice. returned", rare registered letter, superb