The Mavic groups are quite interesting being that about half of their components were actually made by other manufacturers, re-branded for Mavic.
Other than the "Erector" style and electronic RDs and their FDs, their "Starfish" cranksets, Quill Pedals, Some of their their headsets (I think some of them could been made by Stronglight) and maybe their stems, handlebars and seatposts, the other components can be tracked to other companies, like brakesets from Modolo and DiaCompe, pedals from Look, Retrofriction shifters from Simplex..... There also had been rumors that their cranksets (The model 630 fluted, non-"starfish" design) might have come from Sugino(?). I've also heard that their 840 series indexed RD's and shifters might have come from Sachs.
I think that's why the Mavic groups don't seem to attract as many fans as "pure' group/gruppos do, which were designed together by one company. Although individually, like the derailleur sets and cranksets, in mint/NOS condition, tend to pull in significant money when they sell at eBay.
Despite the "mongrel" groups, Mavic seemed to have chosen pretty good components to complete their groups through the years
. I think, the only glaring bad choice was their acceptance of sintered Modolo brake pads on their Modolo sourced brake calipers.....
