Aircraft Rating- Certificate of Test Rubber Stamp

An original rubber stamp which we imagine would have been used to stamp a log book to certify the person named had passed the appropriate test of his ability to act as pilot in command (P1) or co-pilot of the designated type of aircraft detailed. Spaces detailed for a signature, date and the Civil Aviation Authority Authorisation number. The final wording confirms 'This certificate is valid for 13 months from the date of the test shown above'.The stamp appears to have a decent age to it although we are unsure how old it is. Would add an air of authenticity to an aviation desk or display! We don't have an ink pad here but the rubber looks to be in good condition. Stamp measures 4"x 2.25" (10 cm x 6 cm)