RRH

I just picked up these two while in Bolivia. These were the only cobs this guy had and he said he has had them for over fifty years. I can not find anything specific to the exact words/letters/dates. It seems like an in-between production or possibly from a series that was predominantly melted. Any thoughts are appreciated. https://clipchamp.com/watch/wEKSy5jvWbf If this link does not work, I will delete it.