Sorry to revive this topic. I keep meaning to reply to this post, but time moves on and I find other things to do. Anyway, none of the varieties mentioned in this thread are unknown. All of them have been recorded by David Sealy in his Coin varieties column in Coins and Medals and Coins in the late sixties and early Seventies and also by others in Coin Monthly during the same period. One of David Sealy's readers, Mr V.R.Court reported to him (Coins Jan 1970) that he had sorted through 240,000 halfpennies 'culled over a period of a year (July 1968-July 1969)' and found some 350 1957 flat sea halfpennies out of c.13,646 1957 halfpennies which comprised of the following date varieties and numbers. (i) Pointed 7, pointing to a bead, 98. (ii) Pointed 7, pointing to right of a bead, 22. (iii) Pointed 7, pointing to left of a bead, 110. (iv) Pointed 7, pointing to centre of a space, 39. (v) Blunt 7, pointing to a bead, 11. (vi) Blunt 7, pointing to right of a bead, 10. (vii) Blunt 7, pointing to left of a bead, 60. The conclusion drawn, bearing in mind the total mintage of 1957 halfpennies (39,672,000) was that 1322 dies were used for the total reverse minteage and that 35 dies were responsible for the flat sea mintage (c.30,000 coins per reverse die). In other words some 10 reverse dies were used to produce the type (i) and 2 for the type (ii) etc. These figures do seem to fairly represent the rarities of these coins. I think it should be pointed out that the four varieties previously attributed were all reported by David Sealy and his readers in some of his earlier columns and in the 1970 Coins annual. Sorry should be 1,365 not 1,322. Don't know where that came from.