Fascinating, and clearly very, very useful information. Thanks so much for all the digging!
The source, however, would be very informative too.
We do have to remember the caveats of the reliability and accuracy of the source, so that should always be included when referring to the information.
That way, if something else comes to light that is contradictory, at least we know who said what.
I wonder how "Malta Craft Glass" fits in? Might that be after the strike, the remainder of the Craft Glass Ltd. that went on after '78?
Or did it all go belly-up in '78?