The earlier Inter-10s were not full Shimano 600, as I had one (also 531 and with early Shimano forged dropouts) that featured a Huret Titanio decal and came with Huret titanium derailleurs and a Stronglight crank. I parted it out (sin!) and got more than $200 on ebay for the frame and all the parts...but besides the sinfulness it's always a lot more work to sell it bit-by-bit.