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J. T. Whitney, the Glossary

John Timothy Whitney (14 December 1945 – 15 December 1990), known also as Tim Whitney, was an expert on British postmarks who wrote a popular catalogue on the subject that has been through many editions, and the definitive guide to the stamps and postal history of the Isle of Man.^[1]

Gibbons Stamp Monthly

Gibbons Stamp Monthly (GSM) is a British philatelic magazine which can trace its roots back to 1890.

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Muscular dystrophy

Muscular dystrophies (MD) are a genetically and clinically heterogeneous group of rare neuromuscular diseases that cause progressive weakness and breakdown of skeletal muscles over time.

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Philately

Philately is the study of postage stamps and postal history.

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Postage stamp

A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail).

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Postal history

Postal history is the study of postal systems and how they operate and, or, the study of the use of postage stamps and covers and associated postal artifacts illustrating historical episodes in the development of postal systems.

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Postmark

A postmark is a postal marking made on an envelope, parcel, postcard or the like, indicating the place, date and time that the item was delivered into the care of a postal service, or sometimes indicating where and when received or in transit.

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