Thanks for digging out this cite (saves me the trouble). As I’ve already said, I do remember decimal shops and £sd shops, though it appears I’m the only one who does. And yes, the old currency was really referred to in everyday speech as “LSD”. (The £ sign is a stylised capital L.) It stood for “librae, solidi, denarii” which were the nearest Latin equivalents to “pounds, shillings, pence”.
The oldest coins that were still valid at the time of decimalisation were sixpences and shillings dating back to 1816, in the reign of George III. Fat chance of finding anything that old, though. The oldest coin I ever got in my change was an 1870 penny from the reign of Queen Victoria.