I never saw one and neither had Howroyd or Edmiston Looks like their pantograph engraving machine was well past its best by 1972!.
Both Indian and Canadian Sterling SMG's are rare outside India and Canada. A good indication of both keeping to their manufacturing agreement. Although an Indian RFI gun turned up in Africa* by the mines clearance group. We were asked if we wanted it and said yes. The SMG got all tied up in the what was usually a simple diplomatic 'move' - so I say no more
* we think seized from Indian Army UN peace keepers that were there at the time