1925 Estonia early Airmail Registered cover Tallinn to England

Description

1925 Estonia Airmail Registered cover sent from Tallinn to Sutton Coldfield, England.
Has #'s C14-18 complete set.
Condition: Thin on the back where the address has been removed. Also some soiled areas & various bends.
Shipped to WW free, [shipped as a letter].
Tracking # not included.