Stamps were issued in Arzamas from 1874-1908. The difference between these No. 1 and No. 2 indigo stamps is the omission of small stars in the oval, and the change in denomination from 3k to 5k.
The No. 1 stamp is one of five known copies.
1874 Arzamas No. 1
1874 Arzamas No. 2