The record inside was a vinyl 78 (as opposed to the usual shellac or whatever that heavy, brittle stuff is), but what attracted my attention was the way the old price of 19⁄11 (19 shillings 11 pence) was boldly replaced by the new price of 99p. They didn't have to cross out the 19⁄11, nor did they have to make it so big (those letters are 15mm tall). They must have done so just to make the record seem new new new! Never mind that it was a 78 of the Pasadena Roof Orchestra playing Pennies from Heaven — it was 99p, so that meant it was modern.
No, people weren't that gullible in the 1970s. I expect we'll see the same tricks tried should we ever switch to Euros, though.