Hi Mark,
There is a whole district, Bessbrook District No.11 that is made up of five lodges, four of which have 'Bessbrook' in their name as well. The oldest of the five lodges I believe would be LOL 77, Divernagh Ancient Heroes. As far as I know, all five would have been in existence in 1971.
LOL 77 Divernagh Ancient Heroes
LOL 294 Bessbrook
LOL 303 Bessbrook Britannia Temperance
LOL 927 Bessbrook Star of Hope Temperance
LOL 959 Bessbrook Purple Star
I don't know much on any of these lodges, other than the last one, Bessbrook Purple Star who from memory had two of their members killed by the IRA in the Kingsmill Massacre - I think both members are depicted on their lodge banner.
With Bessbrook being a district, they will have hosted a Twelfth of July celebration, it may be worth trying to hunt down a possible booklet that would have been produced for that day, often such a booklet will go into much more detail about the district and the individual lodges.
Regards,
Mark