2 Silver penny Prussian-blue in mixed franking with 1 Silver penny on chamois with mirror-inverted watermark with blue two ring cancel "Brunswick 18 / 1 (1854) " on cover to Mönchengladbach (kingdom Prussia), Postal Union letter the third distance zone, photo expertize Dr. Wilderbeek BPP (2018) : "right stamp above cut into, at the bottom partly touched lightly, otherwise full- having huge margins. The left stamp full- to having huge margins, at the bottom with part of the neighbour and perfect. "