1986 is the earliest I have found type 2 portcullis with incuse rivets. There are quite a few varieties in the reverses and obverses over the years if you compare the circulation issues, the BU set issues and the proof issues. Even though the pictures above show type 1 portcullis as having 110 beads and type 2 having 113 beads, it is not always the case, you can get the type 2 portcullis with the 110 bead reverse too. Here are the Portcullis types I have in my collection (1971 to 1981 I collected circulation and proof, 1982 and 1983 I collected BU set and proof issues and 1984 >2008 I collected circulation and BU set issues) 1971 to 1985 circulation, BU sets and Proof have type 1 1986 circulation has type 1, BU set issue has type 2 1987 circulation and BU set has type 1 1988, 1989 and 1990 circulation has type 1, BU set has type 2 1991 both circulation and BU set are type 1 1992 circulation has type 2 and BU set has type 1 1993 circulation has type 1 and BU set has type 2 1994 both circulation and BU set have types 2 1995 to 2006 circulation and BU set have type 2 2007 and 2008 circulation has type 1, BU set has type 2 Gollly! any similar discrepencies in the 2p series?