But it would be good if you could tell what its condition is. Sometimes we look for a standard to go by, such as might be provided in stamp catalogues, or by dealers. There are many others, but this one serves as an example. May be disturbed slightly, due to heavy, multiple or improper hinging. Not as fresh as VF, but no fading paper No tears, thins, creases, etc.
Any clear postmark is acceptable.
Some fading paper Defects such as creases or staining are apparent centring On imperforate issues, the frameline is just cut into by the edge of the stamp on one or two sides. Perforations touch or cut the design on other issues. A medium cancel covering more of the design than in Fine condition. Cancellation not necessarily legible. Here are several used copies of the same stamp, a 3 cent red stamp showing King George V, issued in about 1930 or 1931.