Up for bid is a single original Experimenter monthly publication from July 1927.  Also included are photocopies that my father had for Volumes 1-3 from 1926, 1927, and 1928...just missing Volume 2 #12 May 1928 and Vol 3 #10 1929.  These early volumes are hard to find, so he probably paid someone for copies 25 years ago. Unfortunately they aren't scans were the quality of the printing couldve been better.

These were typically published monthly except the later years during the summer months and volumes would be combined.  Great for the GR collector of for a person with vintage GR equipment.  

I have more of these that I will be listing, since my father loved the brand and collected everything GR.  I will combine shipping, just wait for an invoice to pay if you are bidding on multiple items.