It was reproofed in 1982. The mark at the lower left is the Birmingham date mark. The "HB" indicates 1982 and the "1" indicates the seniority of the examiner, "1" being most senior. Note that from 1975 to 1984 the date mark used was a circle and not the crossed swords.

As Lagopus stated there does not seem to be a reproof mark.


Regards - Ian Forrester