I recently came across a Winchester model 75 .22LR that a person has, it had been in his possession for a couple of days & he took it to 100 yd. range & test fired 5 shots using the Olympic type peep sights on it. He was impressed by its accuracy, but it was then that he noticed the bolt was stamped “N M”. Another person told him it stands for National Match which an online check shows only one post confirming there were a small number made but not cataloged. Does anyone have any info on these rifles and how many model 75 national match were made?