Spotted around the back of Almería market, what was obviously an old veinte duro, hundred peseta shop which was very careful with the conversion into euros:

100 pesetas is €0,6024. This gentleman (or lady), no doubt somewhat unsure about the new money but eager for any opportunity to rack up the prices, carefully rounded up to 0,61€. How he must have cursed when other canny competitors hit on the spiffing idea of just rounding it up to a euro…

Mind you, it was only a couple of years ago when eating at a fish restaurant in Malaga that I got the bill all in pesetas, and carefully converted the total into euros at the end.