All our stamps are guaranteed authentic, without any indication to the contrary in the description. Defective: patch with defects, usually affected net for non-decks, incomplete indentation for serrated. B/tb : beautiful to very beautiful, the stamp is "almost" tb, possibility of a small defect on the back, or a slight thinning, or a light fold, but the appearance of the stamp is tb. Tb : very beautiful, stamp without any defects and of very beautiful quality, of all 1st choice.Ttb and Sup: superb, unusual, so-called amateur. Nine without hinge or trace: nine with hinge or hinge trace: nine without gum gno: non-original gum càd: stamp with date pc: diamond small digits gc: diamond large digits. Don't hesitate to ask questions. I sell other similar items. The item "flip-blocks n°2, strasbourg 1927, obliterated 12/6/1927 superb out-of-timbers" has been on sale since Saturday 24 July 2021. It is in the category "tamps\france\blocks, sheets". The seller is "philamurat" and is located at/in murat. This item can be delivered anywhere in the world.