This 1981 Trek 616, serial number N3F5A46, is stock original (except saddle, upgraded from Avocet Condor to Racing 1, and bar tape which is later 1980s vinyl Ciclolinea), full Shimano 600 EX Arabesque, components and color (Chestnut - basically metallic brown) matching catalog description. The vintage Trek website says that only the 7 and 9 series that year had the wrap around decals that were on all models starting in 1982. They are wrong. The main tubes are Reynolds 531. I'd love to know the composition of the other tubes. I'd also love to know where and by whom this frame was welded. In Japan vs. Wisconsin? If Japan, by Tange vs. someone else? If a Japanese made frame, it was likely assembled in the USA. Any information would be appreciated.