I am sure many of you are aware of the definition of specimen banknote. In the event that you are new to this, let us explore it. Specimen banknote is normally come with full or all Zero serial number and is stamped or punched with the word "SPECIMEN" on the obverse of the banknote. They are not sent into general circulation.
The 1953 $10 Malaya And British Borneo Specimen Banknote
There are two main purposes as why the specimen banknote is produced. One of the reason is that the specimen banknote is used as sample to check the designs and / or colors prior to full printing runs. Another function of the specimen banknote is to help a central bank to understand or recognise other countries' banknotes specially during the new issuance. It is normally given by the banknote Printer to a central bank to be distributed to other central banks.
The specimen banknote is so rare that only a few are kept at the banknote Printer's archives or at the central banks. Many of these specimen banknotes can be viewed at Money Museum Negara.