Kev,
Fascinating!
My father started his first job, as an apprentice, at Crockett & Guy in, best I can tell, 1928, and worked there for approx., 21 years....again, best I can tell.
He then spent his entire life in the hardware retail business....moving on to Coleraine and later to Ballymena.
He died in 1987.
Let me know what I might have to do to get a copy of that image you have! AND....that apart, have you a scan copy 'up' on line anywhere? Clearly, unless you know of another source, I would be very happy to have a good copy!
With thanks
David