This read-only value is a 64-bit counter of packets that were successfully transmitted after experiencing exactly one collision. It distinguishes transient single-collision events, which are relatively benign, from the more serious multiple-collision or late-collision counts. For example, an admin comparing csEthStatsTxScolPktsOk against csEthStatsTxMulticCollisionPktsOK on the same port judges whether collisions are mostly isolated single events or a sign of heavier contention.