Hard To confirm the authenticity of the marks… But as a description-really all 100 pieces different. Country: Hungary, Румыния, Denmark, Netherlands, India, USSR, Великобритания (most likely), SOUTH AFRICA, Spain, Belgium, Сахарская ADDR, Никарагуа, Бангладеш, Афганистан, Камбоджа, Бразилия, italy, Canada, UNITED STATES, Austria, Австралия, Болгария, Indoneziya, Butane. Some countries-one-two brand, some more. Trying To compare with available with times USSR stamps Hungary and USSR… Венгерская pair matching makes no difference, with Soviet have questions… Where two brand USSR-left the original. Do most likely at least part marks still original. AND most likely because it brand "Workers", IE служившие real sign payment email messages. Small, simple the chart.