I have started to make a list of Massey 25 serial numbers, so far there seems to be a lot more A gears starting with 7 than B gears starting with 8. Malcolm has the highest A gear and I have the highest B gear 85503 if any one knows of any 25s higher than these I would be interested to know.I also have the lowest B gear 85046. Malcolm, Do you know any of the serial numbers of the original importsit would be interesting to see if they are higher numbers