Thanks keefyd. I like the parallel listings idea. I am a child of the sixties and have played with/bought/collected MB all my life apart from a few teenage years when it was uncool (although I kept secretly admiring them.) I have always considered the models available at the start of the year to be the models for that year and then at various stages during the year some of them were replaced. Similarly with colour schemes. The colour at the start of the year is that year’s colour but it may get re-coloured or a variation issued once or twice during the year.