The recycled state (full spin-up, low eccentricity 1.3e-6, evolved WD companion) independently attests to a Gyr-scale binary evolution history: the proposed formation channel involves an original ~3 Msun companion star and predicts the neutron star accreted only a few hundredths of a solar mass, implying it was likely born massive (~1.9 Msun) and has held essentially this mass for its whole life.