The medal at the photo was sold to one of the St. Petersburg antique shops by relative of cavalier, who was awarded with for his work in Manchukuo in 30s and early 40s. He came back to USSR in 1945. The document for the medal (according to relative) was destroyed by cavalier shortly before returning “just in case” (where “case” is 10 years of works camps ).
According to the author of this article obverse inscription reads “State Roads Medal” (rosette obverse bears same inscription)
Reverse inscription reads “Honorary Medal” (column on the left) and “State Roads Administration” (column on the right)
Box cover inscription reads “Honorary Medal. State Roads Administration of Manchudigo”