From the descriptions, it sounds like you have an 1860 Army and Walker reproduction. The serial numbers do not fall within the range of either 2nd Generation or Signature series Colt's, however. The description of the boxes they came in also do not match 2nd Gen or Sig Series Colt's (it's the "two brass snaps" part that throws me).
Pictures of the revolvers and boxes would help, also any other markings on them would help. Look under the loading levers.
Army San Marco made some Colt repros in the 70s that were marked the same as Colts.
Fingers (Show Me MO smoke) McGee - AKA Man of Many Colts - Alter ego of Diabolical Ken; SASS Regulator 28564-L-TG; Rangemaster and stage writer extraordinaire; Frontiersman, Pistoleer, NRA Endowment Life, NMLRA, SAF, CCRKBA, STORM 327, SV115; Charter member, Central Ozarks Western Shooters
Cynic: A blackguard whose faulty vision see things as they are, not as they should be. Ambrose Bierce