=> awesome counterstamps!! ... I have zero-idea what they are, but they are very cool!! yes sadly, that is all I can add to this fine thread!! (cheers, fellas!!)
Sorry, I can't help you either Mark. I don't know off hand of anyone who has researched these chopmarks, but there may be a reference out there somewhere. As a matter of fact, the only reason I don't add a few of them to my collection is because I don't know who issued any of them. Yours is a nice example. Bruce