A little searching on the Hershey Chocolate Company website turned up a photo archive of the old wrapper styles and on another site, I found a list of what years matched which bar weights. Between the two sites, I was able to pinpoint the date as a 1924 wrapper.
I used a color copier to make several copies of the front and back sides of the wrapper, then pieced them together into a large composite. I used the copier again, to make final copies and then cut them out squared on a paper cutter. I affixed a narrow strip of sticker tape along the backside of the overlap edge so they are ready to use........ as "pre-aged" 1924 candy wrappers!
I'll buy some modern chocolate bars, toss the new wrappers and then wrap the bar with my "new Hershey's wrapper!
The "NEW" wrappers ready to go: