These are new repro from used ones. The number on there #580061 is original 1963. From 63 skylark. Possible same on 62 and or 61. The hole it goes in 37/64 in. Just bigger than 9/16". 2- 45/64 in. Tall exluding part goes in hole. Thats additional 1-57/64 in. 1-37/64 in. OD.