Thanks for checking on the APL versions. They seem to be rare birds, though when I was at a university in the 80s it seemed like they were all APL.The eight keyboards arrived today, 3 are 70-23983-EE D01 and five are 70-23983-PE. If I'm correct the 70-23983-PE C01 are known as gold key keyboards and are for word processing, the numeric pad has commands rather than numerals. All appear to work, they all need a good clean and one of the 70-23983-PE the RJ11 (or12?) connector has the tab broken off that locks it into the socket on the terminal. I think I'm going to keep two of the EE and one of the PE keyboards. PM if you have an interest in any of the others, four PE and one EE. No APL versions I'm afraid!