IT WAS MADE IN 1978
I have found in my attic a miners lamp of your manufacture, I was most surprised to find you were still producing !
I wondered if you could date the lamp for me, I suspect its not that old judging by the condition. The details on the plate are Type 6 M & Q safety lamp Approval B/28. On the horizonal area below the glass there is a M and 78/ stamped in.