Front side of cover sent registered by Serebrakian to his brother in Tiflis.
Sent 31.5.1920 from Erivan and arrived 18.6.1920 in Tiflis.
It took the cover 18 days for the trip to Tiflis . This took unusual long. Lilac censor()?) cachet with Armenian characters.
Sent: 31.5.1920 Erivan D
Arrived: 18.6.1920 Tiflis Sh
If that is a censor cachet this would explain the long travel time.