Bought from Japan many years ago. New old stock unused vintage Martin strings when they were still made in the USA as opposed to Mexico currently. The 0.012 gauge packs made in USA, 0.013 gauge packs assembled in Mexico with USA materials. Now current production all fully made in Mexico.
6 packs for $35, a good deal as it works out to less than $6 per pack and it’s considered better than current Martin strings if you ask the old experienced players. 4 packs of 0.012 gauge, 2 packs of 0.013 gauge. Only to be sold together as a package.