>Countries>"G" COUNTRIES>GERMANY>The gum on this sheet is highly acidic and eventually destroys the philatelic value. The sheet is most wisely collected after
The gum on this sheet is highly acidic and eventually destroys the philatelic value. The sheet is most wisely collected after
NH
The gum on this sheet is highly acidic and eventually destroys the philatelic value. The sheet is most wisely collected after the gum has been removed to preserve it.