I came across the November 1969 "British Coin Index" while clearing out before moving house. I must have inherited it from my dad, as I was only 6 years old in 1969.
Some of the prices are quite interesting. Uncirculated Gothic Crowns seem a bargain at £185 (or £210 if you want the plain-edge proof), while poor old Churchill crowns haven't made much progress on the 37.5 pence quote in 1969. On the florins, my particular area of interest, there are some surprises. The 1932 UNC at £230 (not far off today's price in absolute terms) is more than the 1905 (£200) or 1925 (£220), while uncirculated 1849 Godless florins are only £34.