The maps have a print code in bottom right hand corner.
This comprises :
Series code, job number/sheet, month and year of printing, factory code
For example :
И 35/2 VI-84 Л indicates City plan, job 35 sheet2, printed June 1984 at Leningrad
Series codes are :
• А 1:10,000 topo
• Б 1:25,000 topo
• В 1:50,000 topo
• Г 1:100,000 topo
• Д 1:200,000 topo
• Е 1:500,000 topo
• Ж 1:1,000,000 topo
• З 1:2,000,000 and 1:4,000,000 aeronavigation map
• И 1:10,000 and 1:25,000 city plan
Factory codes are :
• Б [not known]
• В Vilnius
• Д Dunayev (Moscow)
• Е [not known]
• И Irkutsk
• К Kiev
• Л Leningrad (now St Petersburg)
• Ср Sverdlovsk (now Ekaterinburg)
• Срт Saratov
• Т Tashkent
• Тб Tblisi
• Хб Khabarovsk