Looking for some help with a Rado Conway (c. 1970) bought on Ebay from a Beverly Hills outfit. Looks very good for 43+ years? Case back looks nothing like Conways I've researched. Has Rado/Water Sealed mark. However, surrounding that are the words: "stainless steel", "automatic", "1187-sj" and "water proof in very clear letters. No serial or model numbers as I've seen on other backs from that era. I know the crystal has been replaced and new band was disclosed. Lume on hands only. Any help confirming what I am already thinking would be appreciated.