I recently purchased a Model 70 in 458 win.mag. in left hand configuration. Serial number indicates that it was made in 1956. Beyond that, I can find no info. on how many LH were made of the pre 64. Inquiry to Winchester received response from Browning stating they didn't have records from Winchester and that they couldn't help. Anybody know how I might learn a little about this gun. Shoots good. Bring on the zombie elephants.