Mark
I have two eye cups, one is a FWB "type" compressing one (but not a FWB), the other is a solid type parallel tube 20 mm long ish, I have not a clue what either came off of, the parallel would look better.
And no they will make no difference to sight, most people took them off, but you are welcome to one if you wish, drop me an e with your address if you'd like it.
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?