  Non-sequential double recombination (NSDR) high-order harmonic generation
(HHG) is studied in a molecular system. We observe a unique molecular
two-electron effect with a characteristic cutoff in the HHG spectrum at higher
energies than what was previously seen for NSDR HHG in atoms. The effect is
corroborated with a classical model where it is found that the effect is
sensitive to the molecular potential and originates from same period emission
and recombination (SPEaR) of two electrons. The effect persists for
intermediate nuclear distances of $R \gtrsim 8.0$ a.u.
