Definitely a LockTop , not a repro. , they weren't reproduced. As far as date go's the earliest date I know of is 1955 but they could be earlier.
You can't rely on the paper battery / bulb service diagram tag for the date , it's just a generic tag they put in every light with the same service instructions. Notice that it's always a torpedo light on the tag no matter what model light you find one in.
Named the " LOCKTOP" for the screw & nut the secures { LOCKS } the top to bottom so the kids at school couldn't steal your batteries without a screwdriver .