Kuvaus
St.-Petersburg 1889 bond 4 % 500 marks ser. B.
«Общество Курско-Харьково-Азовской железной дороги».
A private railway, which was opened in 1869 from Kursk to Kharkiv and continued to Rostov and Azov next year. Planned loan period was 65,5 years, but the line and this company were merged into Sevastopol railway in 1895. The whole railway was nationalized in 1897.
Read more about the line at Wikipedia (in Russian).
Certificate is larger than A3.