Russia Lot Sym. A search of past auction catalogue yielded only few examples of this stamp with original gum.
Most copies have no gum, or at best traces of original gum.
The example offered here may be the finest copy of this stamp known with full original gum. Signed in pencil on back. The unused value is for an example without gum. The very few known stamps with original gum sell for much more. Covers with the stamp cancelled solely by the town marking are scarce.