Very good info Melvin! And this will sure ruffle the feathers of many Raleigh afficionados ... I think the someone Marty is referring to is Mike Mullett. He seldom participates in the CR list debates.
Also nice to hear about the different detailing attributed to Serier and Legrand. Which of course leaves the question who build the '77 Presto I once owned, which didn't have the slotted seatclamp, but did have the overlapping seatstay caps.

When I spoke with Ko Zieleman a couple of years ago, he told me that Gerrie Knetemann once walked into his shop in the Reggestraat, and asked Ko to build him a front fork with more rake for his Raleigh, to be used the next Sunday in Paris-Roubaix! So someone possibly owns a Raleigh built by Legrand and Zieleman ...