March 11th 1972 was a Saturday. From 1969-1976 this was the only Mar 11th that was. Am I in the right time zone?
I tried researching each of these groups but the only one I could find solid information on (apart from Oldham Tinkers, of course) was Hunter Muskett. The information at Wiki says they were active between 1968 and 1974 (and reformed in 2010). On that basis, it has to be 1972 because that's the only year that March 11th fell on a Saturday while Hunter Muskett were active. These are the only years for March 11th being a Saturday, between when the Oldham Tinkers started and this question was asked:
1967, 1972, 1978, 1989, 1995, 2000, 2006.
If you're a Lancastrian and you don't know the Oldham Tinkers, then you're just not in touch with your inner flat cap.